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  <TITLE>sv8</TITLE>
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  <DIV style="font-family: 'Times New Roman',Times,serif">
  
  <DIV align="center" style="font-size: 10pt; margin-top: 12pt"><B>As
  filed with the Securities and Exchange Commission on February
  </B><B>27</B><B>, 2009</B></DIV>
  
  
  <DIV align="right" style="font-size: 10pt; margin-top: 6pt"><B>Registration No.&nbsp;333-</B><B>&#149;</B>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</DIV>
  
  <DIV style="width: 100%; border-bottom: 2pt solid black; font-size: 1pt; margin-top: 3pt">&nbsp;</DIV>
  <DIV style="width: 100%; border-bottom: 1pt solid black; font-size: 1pt">&nbsp;</DIV>
  
  <DIV align="center" style="font-size: 14pt; margin-top: 12pt"><B>UNITED STATES<BR>
  SECURITIES AND EXCHANGE COMMISSION</B>
  </DIV>
  
  <DIV align="center" style="font-size: 12pt"><B>Washington, D.C. 20549</B>
  </DIV>
  
  <DIV align="center" style="font-size: 10pt; margin-top: 12pt"><DIV align="center"><DIV style="font-size: 3pt; margin-top: 16pt; width: 26%; border-top: 1px solid #000000">&nbsp;</DIV></DIV></DIV>
  
  <DIV align="center" style="font-size: 18pt; margin-top: 12pt"><B>FORM S-8</B>
  </DIV>
  
  
  <DIV align="center" style="font-size: 12pt; margin-top: 12pt"><B>REGISTRATION STATEMENT<BR>
  UNDER<BR>
  THE SECURITIES ACT OF 1933</B>
  </DIV>
  
  <DIV align="center" style="font-size: 10pt; margin-top: 12pt"><DIV align="center"><DIV style="font-size: 3pt; margin-top: 16pt; width: 26%; border-top: 1px solid #000000">&nbsp;</DIV></DIV></DIV>
  
  <DIV align="center" style="font-size: 24pt; margin-top: 12pt"><B>Art Technology Group, Inc.</B>
  </DIV>
  
  <DIV align="center" style="font-size: 10pt">(Exact name of registrant as specified in its charter)</DIV>
  
  
  <DIV align="center">
  <TABLE style="font-size: 10pt" cellspacing="0" border="0" cellpadding="0" width="100%">
  <!-- Begin Table Head -->
  <TR valign="bottom">
      <TD width="48%">&nbsp;</TD>
      <TD width="3%">&nbsp;</TD>
      <TD width="48%">&nbsp;</TD>
  </TR>
  <!-- End Table Head -->
  <!-- Begin Table Body -->
  <TR valign="bottom">
      <TD align="center" valign="top"><B>Delaware</B>
  </TD>
      <TD>&nbsp;</TD>
      <TD align="center" valign="top"><B>04-3141918</B></TD>
  </TR>
  <TR valign="bottom">
      <TD align="center" valign="top">(State or other jurisdiction of incorporation or organization)
  </TD>
      <TD>&nbsp;</TD>
      <TD align="center" valign="top">(I.R.S. employer identification no.)</TD>
  </TR>
  <TR valign="bottom"><!-- Blank Space -->
      <TD align="center" valign="top">&nbsp;</TD>
      <TD>&nbsp;</TD>
      <TD align="center" valign="top">&nbsp;</TD>
  </TR>
  <TR valign="bottom">
      <TD align="center" valign="top"><B>One Main Street, Cambridge, Massachusetts</B>
  </TD>
      <TD>&nbsp;</TD>
      <TD align="center" valign="top"><B>02142</B></TD>
  </TR>
  <TR valign="bottom">
      <TD align="center" valign="top">(Address of principal executive offices)
  </TD>
      <TD>&nbsp;</TD>
      <TD align="center" valign="top">(Zip code)</TD>
  </TR>
  <!-- End Table Body -->
  </TABLE>
  </DIV>
  
  <DIV align="center" style="font-size: 10pt; margin-top: 12pt"><B>Amended and Restated 1996 Stock Option Plan</B><BR>
  (Full title of the plan)</DIV>
  
  <DIV align="center" style="font-size: 10pt; margin-top: 12pt"><DIV align="center"><DIV style="font-size: 3pt; margin-top: 16pt; width: 26%; border-top: 1px solid #000000">&nbsp;</DIV></DIV></DIV>
  
  <DIV align="center" style="font-size: 10pt; margin-top: 12pt"><B>Robert D. Burke<BR>
  President and Chief Executive Officer<BR>
  Art Technology Group, Inc.<BR>
  One Main Street<BR>
  Cambridge, Massachusetts 02142</B><BR>
  (Name and address of agent for service)</DIV>
  
  <DIV align="center" style="font-size: 10pt; margin-top: 12pt"><B>(617)&nbsp;386-1000</B><BR>
  (Telephone number, including area code, of agent for service)</DIV>
  
  <DIV align="center" style="font-size: 10pt; margin-top: 12pt"><DIV align="center"><DIV style="font-size: 3pt; margin-top: 16pt; width: 26%; border-top: 1px solid #000000">&nbsp;</DIV></DIV></DIV>
  
  <DIV align="center" style="font-size: 10pt; margin-top: 12pt"><B>Copies to:</B></DIV>
  
  <DIV align="center" style="font-size: 10pt; margin-top: 12pt"><B>John D. Patterson, Jr., Esq.<BR>
  Robert W. Sweet, Jr., Esq.<BR>
  Foley Hoag </B><FONT style="font-variant: SMALL-CAPS"><B>LLP</B></FONT><BR>
  <B>Seaport World Trade Center West<BR>
  155 Seaport Boulevard<BR>
  Boston, Massachusetts 02210<BR>
  Telephone: (617)&nbsp;832-1000<BR>
  Telecopy: (617)&nbsp;832-7000</B></DIV>
  
  <DIV align="center" style="font-size: 10pt; margin-top: 12pt"><DIV align="center"><DIV style="font-size: 3pt; margin-top: 16pt; width: 26%; border-top: 1px solid #000000">&nbsp;</DIV></DIV></DIV>
  
  
  <DIV align="left" style="font-size: 10pt; margin-top: 6pt">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Indicated by check mark whether the registrant is a large accelerated filer, an accelerated
  filer, a non-accelerated filer, or a smaller reporting company. See the definitions of &#147;large
  accelerated filer,&#148; &#147;accelerated filer&#148; and &#147;smaller reporting company&#148; in Rule&nbsp;12b-2 of the
  Exchange Act. (Check one):</DIV>
  
  <DIV align="center">
  <TABLE style="font-size: 10pt" cellspacing="0" border="0" cellpadding="0" width="100%">
  <!-- Begin Table Head -->
  <TR valign="bottom">
      <TD width="22%">&nbsp;</TD>
      <TD width="3%">&nbsp;</TD>
      <TD width="22%">&nbsp;</TD>
      <TD width="3%">&nbsp;</TD>
      <TD width="22%">&nbsp;</TD>
      <TD width="3%">&nbsp;</TD>
      <TD width="22%">&nbsp;</TD>
  </TR>
  <!-- End Table Head -->
  <!-- Begin Table Body -->
  <TR valign="bottom">
      <TD align="center" valign="top">Large accelerated filer <FONT face="Wingdings">&#111;</FONT>
  </TD>
      <TD>&nbsp;</TD>
      <TD align="center" valign="top">Accelerated filer <FONT face="Wingdings">&#254;</FONT>
  </TD>
      <TD>&nbsp;</TD>
      <TD align="center" valign="top">Non-accelerated filer <FONT face="Wingdings">&#111;</FONT>
  </TD>
      <TD>&nbsp;</TD>
      <TD align="center" valign="top">Smaller reporting company <FONT face="Wingdings">&#111;</FONT></TD>
  </TR>
  <TR valign="bottom">
      <TD align="center" valign="top">&nbsp;</TD>
      <TD>&nbsp;</TD>
      <TD colspan="5" valign="top" align="center">(Do not check if a smaller reporting company)&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<BR></TD>
  </TR>
  <!-- End Table Body -->
  </TABLE>
  </DIV>
  
  <DIV align="center" style="font-size: 10pt; margin-top: 12pt"><B>CALCULATION OF REGISTRATION FEE</B></DIV>
  
  <DIV align="center">
  <TABLE style="font-size: 10pt" cellspacing="0" border="0" cellpadding="0" width="100%">
  <TR style="font-size: 1px">
     <TD width="1%">&nbsp;</TD>
      <TD width="47%">&nbsp;</TD>
      <TD width="2%">&nbsp;</TD><!-- VRule -->
      <TD width="2%">&nbsp;</TD>
      <TD width="26%">&nbsp;</TD>
      <TD width="2%">&nbsp;</TD><!-- VRule -->
      <TD width="2%">&nbsp;</TD>
      <TD width="3%">&nbsp;</TD>
      <TD width="2%">&nbsp;</TD><!-- VRule -->
      <TD width="2%">&nbsp;</TD>
      <TD width="3%">&nbsp;</TD>
      <TD width="2%">&nbsp;</TD><!-- VRule -->
      <TD width="2%">&nbsp;</TD>
      <TD width="3%">&nbsp;</TD>
      <TD width="1%">&nbsp;</TD>
  </TR><TR style="font-size: 1px" valign="bottom">
      <TD nowrap align="left" colspan="15" style="border-bottom: 3px double #000000">&nbsp;</TD>
  </TR>
  <TR style="font-size: 8pt" valign="bottom">    <TD width="1%">&nbsp;</TD>
      <TD nowrap align="center"><B>Title of</B></TD>
      <TD style="border-right: 2px solid #000000">&nbsp;</TD>
      <TD>&nbsp;</TD>
      <TD nowrap align="center"><B>Amount</B></TD>
      <TD style="border-right: 2px solid #000000">&nbsp;</TD>
      <TD>&nbsp;</TD>
      <TD nowrap align="center"><B>Proposed maximum</B></TD>
      <TD style="border-right: 2px solid #000000">&nbsp;</TD>
      <TD>&nbsp;</TD>
      <TD nowrap align="center"><B>Proposed maximum</B></TD>
      <TD style="border-right: 2px solid #000000">&nbsp;</TD>
      <TD>&nbsp;</TD>
      <TD nowrap align="center"><B>Amount of</B></TD>
      <TD width="1%">&nbsp;</TD>
  </TR>
  <TR style="font-size: 8pt" valign="bottom">    <TD width="1%">&nbsp;</TD>
      <TD nowrap align="center"><B>securities to be</B></TD>
      <TD style="border-right: 2px solid #000000">&nbsp;</TD>
      <TD>&nbsp;</TD>
      <TD nowrap align="center"><B>to be</B></TD>
      <TD style="border-right: 2px solid #000000">&nbsp;</TD>
      <TD>&nbsp;</TD>
      <TD nowrap align="center"><B>offering price</B></TD>
      <TD style="border-right: 2px solid #000000">&nbsp;</TD>
      <TD>&nbsp;</TD>
      <TD nowrap align="center"><B>aggregate</B></TD>
      <TD style="border-right: 2px solid #000000">&nbsp;</TD>
      <TD>&nbsp;</TD>
      <TD nowrap align="center"><B>registration</B></TD>
      <TD width="1%">&nbsp;</TD>
  </TR>
  <TR style="font-size: 8pt" valign="bottom">    <TD width="1%">&nbsp;</TD>
      <TD nowrap align="center"><B>registered</B></TD>
      <TD style="border-right: 2px solid #000000">&nbsp;</TD>
      <TD>&nbsp;</TD>
      <TD nowrap align="center"><B>registered</B></TD>
      <TD style="border-right: 2px solid #000000">&nbsp;</TD>
      <TD>&nbsp;</TD>
      <TD nowrap align="center"><B>per share</B></TD>
      <TD style="border-right: 2px solid #000000">&nbsp;</TD>
      <TD>&nbsp;</TD>
      <TD nowrap align="center"><B>offering price</B></TD>
      <TD style="border-right: 2px solid #000000">&nbsp;</TD>
      <TD>&nbsp;</TD>
      <TD nowrap align="center"><B>fee</B></TD>
      <TD width="1%">&nbsp;</TD>
  </TR>
  
  <!-- End Table Head -->
  <!-- Begin Table Body -->
  <TR valign="bottom">
      <TD width="1%" style="border-top: 2px solid #000000">&nbsp;</TD>
                      <TD style="border-top: 2px solid #000000"><DIV style="margin-left:15px; text-indent:-15px">Common stock, $0.01 par
  value (1)</DIV></TD>
      <TD style="border-right: 2px solid #000000; border-top: 2px solid #000000">&nbsp;</TD>
      <TD style="border-top: 2px solid #000000">&nbsp;</TD>
      <TD align="center" valign="top" style="border-top: 2px solid #000000">6,400,000 (2)(3)</TD>
      <TD style="border-right: 2px solid #000000; border-top: 2px solid #000000">&nbsp;</TD>
      <TD style="border-top: 2px solid #000000">&nbsp;</TD>
  
  <TD align="center" valign="top" style="border-top: 2px solid #000000" nowrap>$2.395&nbsp;(4)</TD>
      <TD style="border-right: 2px solid #000000; border-top: 2px solid #000000">&nbsp;</TD>
      <TD style="border-top: 2px solid #000000">&nbsp;</TD>
  
  <TD align="center" valign="top" style="border-top: 2px solid #000000">$15,328,000</TD>
      <TD style="border-right: 2px solid #000000; border-top: 2px solid #000000">&nbsp;</TD>
      <TD style="border-top: 2px solid #000000">&nbsp;</TD>
  
  <TD align="center" valign="top" style="border-top: 2px solid #000000">$602.39</TD>
      <TD width="1%" style="border-top: 2px solid #000000">&nbsp;</TD>
  </TR>
  <TR style="font-size: 1px" valign="bottom">
      <TD nowrap align="left" colspan="15" style="border-top: 3px double #000000">&nbsp;</TD>
  </TR>
  </TABLE>
  </DIV>
  
  <TABLE width="100%" border="0" cellpadding="0" cellspacing="0" style="font-size: 10pt">
  <TR style="font-size: 6pt">
     <TD width="3%">&nbsp;</TD>
      <TD width="1%"></TD>
      <TD width="96"></TD>
  </TR>
  
  <TR valign="top">
      <TD nowrap align="left">(1)</TD>
      <TD>&nbsp;</TD>
      <TD>Each share includes one right to purchase shares of the Registrant&#146;s series A junior
  participating preferred stock pursuant to the terms of a Rights Agreement, dated September&nbsp;26,
  2001, between the Registrant and EquiServe Trust Company, N.A.</TD>
  </TR>
  
  <TR style="font-size: 3pt"><TD>&nbsp;</TD></TR>
  
  <TR valign="top">
      <TD nowrap align="left">(2)</TD>
      <TD>&nbsp;</TD>
      <TD>Represents shares of the Registrant&#146;s common stock issuable pursuant to awards granted under
  the Amended and Restated 2006 Stock Option Plan of Art Technology Group, Inc. (the &#147;<B><I>2006 Stock
  Plan</I></B>&#148;).</TD>
  </TR>
  
  <TR style="font-size: 3pt"><TD>&nbsp;</TD></TR>
  
  <TR valign="top">
      <TD nowrap align="left">(3)</TD>
      <TD>&nbsp;</TD>
      <TD>Pursuant to Rule 416(a) under the Securities Act, this Registration Statement shall also
  cover any additional shares of the Registrant&#146;s common stock that become issuable under the
  1996 Plan by reason of any stock dividend, stock split, recapitalization or other similar
  transaction effected without the receipt of consideration that increases the number of the
  Registrant&#146;s outstanding shares of common stock.</TD>
  </TR>
  
  <TR style="font-size: 3pt"><TD>&nbsp;</TD></TR>
  
  <TR valign="top">
      <TD nowrap align="left">(4)</TD>
      <TD>&nbsp;</TD>
      <TD>The proposed maximum offering price per share has been estimated in accordance with Rule
  457(c) and Rule 457(h) under the Securities Act solely for the purpose of calculating the
  registration fee of shares reserved for future issuance based on the average of the high and
  low price of the Registrant&#146;s common stock as quoted on the
  Nasdaq Global Market on February 25, 2009.</TD>
  </TR>
  </TABLE>
  
  <DIV style="width: 100%; border-bottom: 1pt solid black; margin-top: 10pt; font-size: 1pt">&nbsp;</DIV>
  <DIV style="width: 100%; border-bottom: 2pt solid black; font-size: 1pt">&nbsp;</DIV>
  
  <P align="center" style="font-size: 10pt"><!-- Folio -->&nbsp;<!-- /Folio -->
  </DIV>
  <!-- PAGEBREAK -->
  <P><HR noshade><P>
  <H5 align="left" style="page-break-before:always">&nbsp;</H5><P>
  <DIV style="font-family: 'Times New Roman',Times,serif">
  
  <!--TOC-->
  <!--/TOC-->
  
  <DIV align="left" style="font-size: 10pt; margin-top: 6pt">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;This Registration Statement is filed pursuant to General Instruction E to Form S-8 by Art
  Technology Group, Inc., a Delaware corporation (the &#147;<B><I>Registrant</I></B>&#148;) to register 6,400,000 shares of
  the Registrant&#146;s common stock, $0.01 par value per share, issuable pursuant to the Registrant&#146;s
  Amended and Restated 1996 Stock Option Plan (&#147;<B><I>2006 Stock Plan</I></B>&#148;), which shares are in addition to
  those previously registered on the Forms S-8 (File Nos. 333-83325, 333-38926, and 333-73664) filed
  with the Securities and Exchange Commission on July&nbsp;21, 1999, June&nbsp;9, 2000 and November&nbsp;19, 2001,
  respectively (the &#147;<B><I>Original Registration Statement</I></B><B>s</B>&#148;).
  </DIV>
  <!-- link1 "PART II" -->
  <DIV align="center" style="font-size: 10pt; margin-top: 10pt"><B>PART II</B></DIV>
  
  <DIV align="center" style="font-size: 10pt"><B>INFORMATION REQUIRED IN THE REGISTRATION STATEMENT</B></DIV>
  
  
  <!-- link2 "Item&nbsp;3. Incorporation of Documents by Reference" -->
  <DIV align="left" style="font-size: 10pt; margin-top: 12pt"><B>Item&nbsp;3. Incorporation of Documents by Reference.</B></DIV>
  
  <DIV align="left" style="font-size: 10pt; margin-top: 6pt">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;The Registrant incorporates herein by reference the contents of the previously filed Original
  Registration Statements and the following documents filed with the Securities and Exchange
  Commission:</DIV>
  
  <DIV style="margin-top: 6pt">
  <TABLE width="100%" border="0" cellpadding="0" cellspacing="0" style="font-size: 10pt">
  <TR valign="top" style="font-size: 10pt; color: #000000; background: transparent">
      <TD width="2%" style="background: transparent">&nbsp;</TD>
      <TD width="3%" nowrap align="left">(a)</TD>
      <TD width="1%">&nbsp;</TD>
      <TD>the Registrant&#146;s Annual Report on Form 10-K for the year ended December&nbsp;31,
  2008, as filed with the Commission pursuant to Section&nbsp;13 of the Exchange Act;</TD>
  </TR>
  
  <TR>
      <TD style="font-size: 6pt">&nbsp;</TD>
  </TR><TR valign="top" style="font-size: 10pt; color: #000000; background: transparent">
      <TD width="2%" style="background: transparent">&nbsp;</TD>
      <TD width="3%" nowrap align="left">(b)</TD>
      <TD width="1%">&nbsp;</TD>
      <TD>the Registrant&#146;s Current Reports on Form 8-K filed on February&nbsp;5, 2009; and</TD>
  </TR>
  
  <TR>
      <TD style="font-size: 6pt">&nbsp;</TD>
  </TR><TR valign="top" style="font-size: 10pt; color: #000000; background: transparent">
      <TD width="2%" style="background: transparent">&nbsp;</TD>
      <TD width="3%" nowrap align="left">(c)</TD>
      <TD width="1%">&nbsp;</TD>
      <TD>the description of the Registrant&#146;s common stock and related preferred stock
  purchase rights contained in the Registrant&#146;s registration statement on Form 8-A filed
  on July&nbsp;12, 1999, together with amendments and reports filed for the purpose of
  updating that description, including Amendment No.&nbsp;1 to Form 8-A filed on October&nbsp;2,
  2001.</TD>
  </TR>
  
  </TABLE>
  </DIV>
  
  <DIV align="left" style="font-size: 10pt; margin-top: 6pt">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;All documents subsequently filed by Registrant pursuant to Sections&nbsp;13(a), 13(c), 14 and 15(d)
  of the Exchange Act, prior to the filing of a post-effective amendment which indicates that all
  securities offered have been sold or which deregisters all securities then remaining unsold, shall
  be deemed to be incorporated by reference in this registration statement and to be a part hereof
  from the dates of filing of those documents.
  </DIV>
  
  <DIV align="left" style="font-size: 10pt; margin-top: 6pt">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Under no circumstances will any information filed under items 2.02 or 7.01 of Form 8-K be
  deemed incorporated herein by reference unless such Form 8-K expressly provides to the contrary.
  </DIV>
  
  <DIV align="left" style="font-size: 10pt; margin-top: 6pt">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;You may request a copy of the filings incorporated by reference herein, at no cost, by writing
  or telephoning the Registrant at:
  </DIV>
  
  <DIV align="Center" style="font-size: 10pt; margin-top: 6pt">Art Technology Group, Inc.<BR>
  One Main Street<BR>
  Cambridge, Massachusetts 02142<BR>
  (617)&nbsp;386-1000
  
  </DIV>
  
  <DIV align="left" style="font-size: 10pt; margin-top: 6pt">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;You should rely only on the information provided or incorporated by reference in this
  registration statement or any related prospectus. The Registrant has not authorized anyone to
  provide you with different information. You should not assume that the information in this
  registration statement or any related prospectus is accurate as of any date other than the date on
  the front of the document.
  </DIV>
  <!-- link2 "Item&nbsp;4. Description of Securities" -->
  <DIV align="left" style="font-size: 10pt; margin-top: 12pt"><B>Item&nbsp;4. Description of Securities.</B></DIV>
  
  <DIV align="left" style="font-size: 10pt; margin-top: 6pt">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Not applicable.
  </DIV>
  <!-- link2 "Item&nbsp;5. Interests of Named Experts and Counsel" -->
  <DIV align="left" style="font-size: 10pt; margin-top: 12pt"><B>Item&nbsp;5. Interests of Named Experts and Counsel.</B></DIV>
  
  <DIV align="left" style="font-size: 10pt; margin-top: 6pt">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;The validity of the securities registered hereby is being passed upon for the Registrant by
  Foley Hoag LLP, Boston, Massachusetts.
  </DIV>
  <!-- link2 "Item&nbsp;6. Indemnification of Directors and Officers" -->
  <DIV align="left" style="font-size: 10pt; margin-top: 12pt"><B>Item&nbsp;6. Indemnification of Directors and Officers.</B></DIV>
  
  <DIV align="left" style="font-size: 10pt; margin-top: 6pt">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Incorporated by reference to the Original Registration Statements.
  </DIV>
  
  <P align="center" style="font-size: 10pt"><!-- Folio -->&nbsp;<!-- /Folio -->
  </DIV>
  <!-- PAGEBREAK -->
  <P><HR noshade><P>
  <H5 align="left" style="page-break-before:always">&nbsp;</H5><P>
  <DIV style="font-family: 'Times New Roman',Times,serif">
  <!-- link2 "Item&nbsp;7. Exemption from Registration Claimed" -->
  <DIV align="left" style="font-size: 10pt; margin-top: 12pt"><B>Item&nbsp;7. Exemption from Registration Claimed.</B></DIV>
  
  
  <DIV align="left" style="font-size: 10pt; margin-top: 6pt">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Not applicable.
  </DIV>
  <!-- link2 "Item&nbsp;8. Exhibits" -->
  <DIV align="left" style="font-size: 10pt; margin-top: 12pt"><B>Item&nbsp;8. Exhibits.</B></DIV>
  
  <DIV align="left" style="font-size: 10pt; margin-top: 6pt">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;The following exhibits are included as part of this registration statement.</DIV>
  
  <DIV align="center">
  <TABLE style="font-size: 10pt" cellspacing="0" border="0" cellpadding="0" width="100%">
  <!-- Begin Table Head -->
  <TR valign="bottom">
      <TD width="1%">&nbsp;</TD>
      <TD width="1%">&nbsp;</TD>
      <TD width="1%">&nbsp;</TD>
      <TD width="5%">&nbsp;</TD>
      <TD width="44%">&nbsp;</TD>
      <TD width="5%">&nbsp;</TD>
      <TD width="3%">&nbsp;</TD>
      <TD width="5%">&nbsp;</TD>
      <TD width="4%">&nbsp;</TD>
      <TD width="5%">&nbsp;</TD>
      <TD width="17%">&nbsp;</TD>
      <TD width="5%">&nbsp;</TD>
      <TD width="1%">&nbsp;</TD>
      <TD width="2%">&nbsp;</TD>
      <TD width="1%">&nbsp;</TD>
  </TR>
  <TR style="font-size: 8pt" valign="bottom">
      <TD>&nbsp;</TD>
      <TD>&nbsp;</TD>
      <TD>&nbsp;</TD>
      <TD>&nbsp;</TD>
      <TD>&nbsp;</TD>
      <TD>&nbsp;</TD>
      <TD nowrap align="center"><B>Filed with</B></TD>
      <TD>&nbsp;</TD>
      <TD nowrap align="center" colspan="7" style="border-bottom: 1px solid #000000"><B>Incorporated by reference</B></TD>
  </TR>
  <TR style="font-size: 8pt" valign="bottom">
      <TD nowrap align="center" colspan="3"><B>Exhibit</B></TD>
      <TD>&nbsp;</TD>
      <TD>&nbsp;</TD>
      <TD>&nbsp;</TD>
      <TD nowrap align="center"><B>this Form</B></TD>
      <TD>&nbsp;</TD>
      <TD>&nbsp;</TD>
      <TD>&nbsp;</TD>
      <TD nowrap align="center"><B>Filing Date with</B></TD>
      <TD>&nbsp;</TD>
      <TD nowrap align="center" colspan="3"><B>Exhibit</B></TD>
  </TR>
  <TR style="font-size: 8pt" valign="bottom">
      <TD nowrap align="center" colspan="3" style="border-bottom: 1px solid #000000"><B>Number</B></TD>
      <TD>&nbsp;</TD>
      <TD nowrap align="center" style="border-bottom: 1px solid #000000"><B>Description</B></TD>
      <TD>&nbsp;</TD>
      <TD nowrap align="center" style="border-bottom: 1px solid #000000"><B>S-8</B></TD>
      <TD>&nbsp;</TD>
      <TD nowrap align="center" style="border-bottom: 1px solid #000000"><B>Form</B></TD>
      <TD>&nbsp;</TD>
      <TD nowrap align="center" style="border-bottom: 1px solid #000000"><B>SEC</B></TD>
      <TD>&nbsp;</TD>
      <TD nowrap align="center" colspan="3" style="border-bottom: 1px solid #000000"><B>Number</B></TD>
  </TR>
  
  <!-- End Table Head -->
  <!-- Begin Table Body -->
  <TR valign="bottom">
      <TD nowrap align="right" valign="top">&nbsp;</TD>
      <TD align="right" valign="top">4.1</TD>
      <TD nowrap valign="top">&nbsp;</TD>
      <TD>&nbsp;</TD>
      <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">Amended and Restated Certificate
  of Incorporation of Art
  Technology Group, Inc.
  </DIV></TD>
      <TD>&nbsp;</TD>
      <TD align="left" valign="top">&nbsp;</TD>
      <TD>&nbsp;</TD>
      <TD align="right" valign="bottom">S-8</TD>
      <TD>&nbsp;</TD>
      <TD align="left" valign="bottom" nowrap>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;June&nbsp;12, 2003</TD>
      <TD>&nbsp;</TD>
      <TD nowrap align="right" valign="top">&nbsp;</TD>
      <TD align="right" valign="bottom">4.1</TD>
      <TD nowrap valign="top">&nbsp;</TD>
  </TR>
  <TR style="font-size: 10pt">
      <TD>&nbsp;</TD>
  </TR>
  <TR valign="bottom">
      <TD nowrap align="right" valign="top">&nbsp;</TD>
      <TD align="right" valign="top">4.2</TD>
      <TD nowrap valign="top">&nbsp;</TD>
      <TD>&nbsp;</TD>
      <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">Amended and Restated By-Laws of
  Art Technology Group, Inc.</DIV></TD>
      <TD>&nbsp;</TD>
      <TD align="left" valign="top">&nbsp;</TD>
      <TD>&nbsp;</TD>
      <TD align="right" valign="bottom">S-3</TD>
      <TD>&nbsp;</TD>
      <TD align="left" valign="bottom" nowrap>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;July&nbsp;6, 2001</TD>
      <TD>&nbsp;</TD>
      <TD nowrap align="right" valign="top">&nbsp;</TD>
      <TD align="right" valign="bottom">4.2</TD>
      <TD nowrap valign="top">&nbsp;</TD>
  </TR>
  <TR style="font-size: 10pt">
      <TD>&nbsp;</TD>
  </TR>
  <TR valign="bottom">
      <TD nowrap align="right" valign="top">&nbsp;</TD>
      <TD align="right" valign="top">4.3</TD>
      <TD nowrap valign="top">&nbsp;</TD>
      <TD>&nbsp;</TD>
      <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">Specimen common stock certificate</DIV></TD>
      <TD>&nbsp;</TD>
      <TD align="left" valign="top">&nbsp;</TD>
      <TD>&nbsp;</TD>
      <TD align="left" valign="bottom" nowrap>&nbsp;S-1/A</TD>
      <TD>&nbsp;</TD>
      <TD align="left" valign="bottom" nowrap>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;July&nbsp;13, 1999</TD>
      <TD>&nbsp;</TD>
      <TD nowrap align="right" valign="top">&nbsp;</TD>
      <TD align="right" valign="bottom">4</TD>
      <TD nowrap valign="top">&nbsp;</TD>
  </TR>
  <TR style="font-size: 10pt">
      <TD>&nbsp;</TD>
  </TR>
  <TR valign="bottom">
      <TD nowrap align="right" valign="top">&nbsp;</TD>
      <TD align="right" valign="top">4.4</TD>
      <TD nowrap valign="top">&nbsp;</TD>
      <TD>&nbsp;</TD>
      <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">Rights Agreement dated September
  26, 2001 between Art Technology
  Group, Inc. and Computershare
  Investor Services f/k/a
  EquiServe Trust Company, N.A.,
  as rights agent</DIV></TD>
      <TD>&nbsp;</TD>
      <TD align="left" valign="top">&nbsp;</TD>
      <TD>&nbsp;</TD>
      <TD align="right" valign="bottom">8-K</TD>
      <TD>&nbsp;</TD>
      <TD align="left" valign="bottom" nowrap>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;October&nbsp;2, 2001</TD>
      <TD>&nbsp;</TD>
      <TD nowrap align="right" valign="top">&nbsp;</TD>
      <TD align="right" valign="bottom">4.1</TD>
      <TD nowrap valign="top">&nbsp;</TD>
  </TR>
  <TR style="font-size: 10pt">
      <TD>&nbsp;</TD>
  </TR>
  <TR valign="bottom">
      <TD nowrap align="right" valign="top">&nbsp;</TD>
      <TD align="right" valign="top">4.5</TD>
      <TD nowrap valign="top">&nbsp;</TD>
      <TD>&nbsp;</TD>
      <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">Art Technology Group, Inc.
  Amended and Restated 1996 Stock
  Option Plan</DIV></TD>
      <TD>&nbsp;</TD>
      <TD align="left" valign="top">&nbsp;</TD>
      <TD>&nbsp;</TD>
      <TD align="right" valign="bottom">10-K</TD>
      <TD>&nbsp;</TD>
      <TD align="left" valign="bottom">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;February&nbsp;27, 2009</TD>
      <TD>&nbsp;</TD>
      <TD>&nbsp;</TD>
      <TD align="right" valign="bottom">10.1</TD>
      <TD nowrap valign="top">&nbsp;</TD>
  </TR>
  <TR style="font-size: 10pt">
      <TD>&nbsp;</TD>
  </TR>
  <TR valign="bottom">
      <TD nowrap align="right" valign="top">&nbsp;</TD>
      <TD align="right" valign="top">5.1</TD>
      <TD nowrap valign="top">&nbsp;</TD>
      <TD>&nbsp;</TD>
      <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">Legal opinion of Foley Hoag LLP</DIV></TD>
      <TD>&nbsp;</TD>
      <TD align="left" valign="top">X</TD>
      <TD>&nbsp;</TD>
      <TD align="left" valign="top">&nbsp;</TD>
      <TD>&nbsp;</TD>
      <TD align="left" valign="top">&nbsp;</TD>
      <TD>&nbsp;</TD>
      <TD nowrap align="right" valign="top">&nbsp;</TD>
      <TD align="right" valign="top">&nbsp;</TD>
      <TD valign="top">&nbsp;</TD>
  </TR>
  <TR style="font-size: 10pt">
      <TD>&nbsp;</TD>
  </TR>
  <TR valign="bottom">
      <TD nowrap align="right" valign="top">&nbsp;</TD>
      <TD align="right" valign="top">23.1</TD>
      <TD nowrap valign="top">&nbsp;</TD>
      <TD>&nbsp;</TD>
      <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">Consent of Ernst &#038; Young LLP</DIV></TD>
      <TD>&nbsp;</TD>
      <TD align="left" valign="top">X</TD>
      <TD>&nbsp;</TD>
      <TD align="left" valign="top">&nbsp;</TD>
      <TD>&nbsp;</TD>
      <TD align="left" valign="top">&nbsp;</TD>
      <TD>&nbsp;</TD>
      <TD nowrap align="right" valign="top">&nbsp;</TD>
      <TD align="right" valign="top">&nbsp;</TD>
      <TD valign="top">&nbsp;</TD>
  </TR>
  <TR style="font-size: 10pt">
      <TD>&nbsp;</TD>
  </TR>
  <TR valign="bottom">
      <TD nowrap align="right" valign="top">&nbsp;</TD>
      <TD align="right" valign="top">23.2</TD>
      <TD nowrap valign="top">&nbsp;</TD>
      <TD>&nbsp;</TD>
      <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">Consent of Foley Hoag LLP
  (contained in Exhibit&nbsp;5.1)</DIV></TD>
      <TD>&nbsp;</TD>
      <TD align="left" valign="top">X</TD>
      <TD>&nbsp;</TD>
      <TD align="left" valign="top">&nbsp;</TD>
      <TD>&nbsp;</TD>
      <TD align="left" valign="top">&nbsp;</TD>
      <TD>&nbsp;</TD>
      <TD nowrap align="right" valign="top">&nbsp;</TD>
      <TD align="right" valign="top">&nbsp;</TD>
      <TD valign="top">&nbsp;</TD>
  </TR>
  <TR style="font-size: 10pt">
      <TD>&nbsp;</TD>
  </TR>
  <TR valign="bottom">
      <TD nowrap align="right" valign="top">&nbsp;</TD>
      <TD align="right" valign="top">24.1</TD>
      <TD nowrap valign="top">&nbsp;</TD>
      <TD>&nbsp;</TD>
      <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">Power of Attorney (included on
  the signature page of this
  registration statement)</DIV></TD>
      <TD>&nbsp;</TD>
      <TD align="left" valign="bottom">X</TD>
      <TD>&nbsp;</TD>
      <TD align="left" valign="top">&nbsp;</TD>
      <TD>&nbsp;</TD>
      <TD align="left" valign="top">&nbsp;</TD>
      <TD>&nbsp;</TD>
      <TD nowrap align="right" valign="top">&nbsp;</TD>
      <TD align="right" valign="top">&nbsp;</TD>
      <TD valign="top">&nbsp;</TD>
  </TR>
  </TABLE>
  </DIV>
  
  <!-- link2 "Item&nbsp;9. Undertakings" -->
  <DIV align="left" style="font-size: 10pt; margin-top: 12pt"><B>Item&nbsp;9. Undertakings.</B></DIV>
  
  
  <DIV align="left" style="font-size: 10pt; margin-top: 6pt">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Incorporated by reference to the Original Registration Statements.
  </DIV>
  <!-- link1 "SIGNATURES" -->
  <DIV align="center" style="font-size: 10pt; margin-top: 10pt"><B>SIGNATURES</B></DIV>
  
  <DIV align="left" style="font-size: 10pt; margin-top: 6pt">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Pursuant to the requirements of the Securities Act of 1933, the registrant certifies that it
  has reasonable grounds to believe that it meets all of the requirements for filing on Form S-8 and
  has duly caused this registration statement to be signed on its behalf by the undersigned,
  thereunto duly authorized, in the City of Cambridge, Commonwealth of
  Massachusetts, on this 27<sup>th</sup> day
  of February, 2009.
  </DIV>
  
  <TABLE width="100%" border="0" cellspacing="0" cellpadding="0" style="font-size: 10pt">
  <TR>
      <TD width="48%">&nbsp;</TD>
      <TD width="1%">&nbsp;</TD>
      <TD width="1%">&nbsp;</TD>
      <TD width="35%">&nbsp;</TD>
      <TD width="15%">&nbsp;</TD>
  </TR>
  <TR>
      <TD valign="top" align="left">&nbsp;</TD>
      <TD colspan="3" align="left"><FONT style="font-variant: SMALL-CAPS"><B>Art Technology Group, Inc.</B></FONT><BR>
  &nbsp;</TD>
      <TD>&nbsp;</TD>
  </TR><TR>
      <TD align="left">&nbsp;</TD>
      <TD valign="top">By:&nbsp;&nbsp;</TD>
  
  <TD colspan="2" style="border-bottom: 1px solid #000000" align="left">/s/ Robert D. Burke&nbsp;
  </TD>
      <TD>&nbsp;</TD>
  </TR><TR>
      <TD align="left">&nbsp;</TD>
      <TD>&nbsp;</TD>
      <TD colspan="2" align="left">Robert D. Burke&nbsp;</TD>
      <TD>&nbsp;</TD>
  </TR><TR>
      <TD align="left">&nbsp;</TD>
      <TD>&nbsp;</TD>
      <TD colspan="2" align="left">President and Chief Executive Officer&nbsp;</TD>
      <TD>&nbsp;</TD>
  </TR>
  <TR>
      <TD colspan="5">&nbsp;</TD>
  </TR>
  </TABLE>
  
  <P align="center" style="font-size: 10pt"><!-- Folio -->&nbsp;<!-- /Folio -->
  </DIV>
  <!-- PAGEBREAK -->
  <P><HR noshade><P>
  <H5 align="left" style="page-break-before:always">&nbsp;</H5><P>
  <DIV style="font-family: 'Times New Roman',Times,serif">
  
  <!-- link1 "POWER OF ATTORNEY" -->
  <DIV align="center" style="font-size: 10pt; margin-top: 10pt"><B>POWER OF ATTORNEY</B></DIV>
  
  <DIV align="left" style="font-size: 10pt; margin-top: 6pt">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;KNOW ALL BY THESE PRESENTS that each individual whose signature appears below hereby
  constitutes and appoints Robert D. Burke and Julie M.B. Bradley, and each of them, his or her true
  and lawful attorneys-in-fact and agents with full power of substitution, for him or her and in his
  or her name, place and stead, in any and all capacities, to sign any and all amendments (including
  post-effective amendments) to this registration statement, and to file the same, with all exhibits
  thereto, and all documents in connection therewith, with the Securities and Exchange Commission,
  granting unto said attorneys-in-fact and agents, and each of them, full power and authority to do
  and perform each and every act and thing which they, or any of them, may deem necessary or
  advisable to be done in connection with this registration statement, as fully to all intents and
  purposes as he or she might or could do in person, hereby ratifying and confirming all that said
  attorneys-in-fact and agents or any of them, or any substitute or substitutes for him or her, or
  any or all of them, may lawfully do or cause to be done by virtue hereof.</DIV>
  
  <DIV align="left" style="font-size: 10pt; margin-top: 6pt">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Pursuant to the requirements of the Securities Act, this registration statement has been
  signed by the following persons in the indicated capacities as of
  this 27<sup>th</sup> day of February, 2009.</DIV>
  
  <DIV align="center">
  <TABLE style="font-size: 10pt" cellspacing="0" border="0" cellpadding="0" width="100%">
  <!-- Begin Table Head -->
  <TR valign="bottom">
      <TD width="30%">&nbsp;</TD>
      <TD width="10%">&nbsp;</TD>
      <TD width="50%">&nbsp;</TD>
  </TR>
  <TR style="font-size: 8pt" valign="bottom">
      <TD nowrap align="center" style="border-bottom: 1px solid #000000"><B>Signature</B></TD>
      <TD>&nbsp;</TD>
      <TD nowrap align="center" style="border-bottom: 1px solid #000000"><B>Title</B></TD>
  </TR>
  
  <!-- End Table Head -->
  <!-- Begin Table Body -->
  <TR valign="bottom"><!-- Blank Space -->
      <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">&nbsp;</DIV></TD>
      <TD>&nbsp;</TD>
      <TD align="left" valign="top">&nbsp;</TD>
  </TR>
  <TR valign="bottom">
      <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">/s/ Robert D. Burke&nbsp;</DIV></TD>
      <TD>&nbsp;</TD>
      <TD align="left" valign="top">President, Chief Executive Officer and Director</TD>
  </TR>
  <TR valign="bottom">
      <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">
  <DIV style="font-size: 1pt; border-top: 1px solid #000000">&nbsp;</DIV>
  Robert D. Burke</DIV></TD>
      <TD>&nbsp;</TD>
      <TD align="left" valign="top">&nbsp;<I>(Principal
  Executive Officer)</I></TD>
  </TR>
  <TR valign="bottom"><!-- Blank Space -->
      <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">&nbsp;</DIV></TD>
      <TD>&nbsp;</TD>
      <TD align="left" valign="top">&nbsp;</TD>
  </TR>
  <TR valign="bottom">
      <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">/s/ Julie M.B. Bradley</DIV></TD>
      <TD>&nbsp;</TD>
      <TD align="left" valign="top">Senior Vice President and Chief Financial Officer</TD>
  </TR>
  <TR valign="bottom">
      <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px"><DIV style="font-size: 1pt; border-top: 1px solid #000000">&nbsp;</DIV>
  Julie M.B. Bradley</DIV></TD>
      <TD>&nbsp;</TD>
      <TD align="left" valign="top">&nbsp;<I>(Principal
  Financial and Accounting Officer)</I></TD>
  </TR>
  <TR valign="bottom"><!-- Blank Space -->
      <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">&nbsp;</DIV></TD>
      <TD>&nbsp;</TD>
      <TD align="left" valign="top">&nbsp;</TD>
  </TR>
  <TR valign="bottom">
  
  <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">/s/ Daniel C. Regis</DIV></TD>
      <TD>&nbsp;</TD>
      <TD align="left" valign="top">Chairman of the Board</TD>
  </TR>
  <TR valign="bottom">
      <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px"><DIV style="font-size: 1pt; border-top: 1px solid #000000">&nbsp;</DIV>
  Daniel C. Regis</DIV></TD>
      <TD>&nbsp;</TD>
      <TD align="left" valign="top">&nbsp;</TD>
  </TR>
  <TR valign="bottom"><!-- Blank Space -->
      <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">&nbsp;</DIV></TD>
      <TD>&nbsp;</TD>
      <TD align="left" valign="top">&nbsp;</TD>
  </TR>
  <TR valign="bottom">
      <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">/s/ Michael A. Brochu</DIV></TD>
      <TD>&nbsp;</TD>
      <TD align="left" valign="top">Director</TD>
  </TR>
  <TR valign="bottom">
      <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px"><DIV style="font-size: 1pt; border-top: 1px solid #000000">&nbsp;</DIV>
  Michael A. Brochu</DIV></TD>
      <TD>&nbsp;</TD>
      <TD align="left" valign="top">&nbsp;</TD>
  </TR>
  <TR valign="bottom"><!-- Blank Space -->
      <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">&nbsp;</DIV></TD>
      <TD>&nbsp;</TD>
      <TD align="left" valign="top">&nbsp;</TD>
  </TR>
  <TR valign="bottom">
  
  <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">/s/ David B. Elsbree</DIV></TD>
      <TD>&nbsp;</TD>
      <TD align="left" valign="top">Director</TD>
  </TR>
  <TR valign="bottom">
      <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px"><DIV style="font-size: 1pt; border-top: 1px solid #000000">&nbsp;</DIV>
  David B. Elsbree</DIV></TD>
      <TD>&nbsp;</TD>
      <TD align="left" valign="top">&nbsp;</TD>
  </TR>
  <TR style="font-size: 10pt">
      <TD>&nbsp;</TD>
  </TR>
  <TR valign="bottom">
  
  <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">/s/ John R. Held</DIV></TD>
      <TD>&nbsp;</TD>
      <TD align="left" valign="top">Director</TD>
  </TR>
  
  <TR valign="bottom">
      <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">
  <DIV style="font-size: 1pt; border-top: 1px solid #000000">&nbsp;</DIV>
  John R. Held</DIV></TD>
      <TD>&nbsp;</TD>
      <TD align="left" valign="top">&nbsp;</TD>
  </TR>
  <TR style="font-size: 10pt">
  <td>&nbsp;</td>
  </TR>
  
  <TR valign="bottom">
  
  <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">/s/ Ilene H. Lang</DIV></TD>
      <TD>&nbsp;</TD>
      <TD align="left" valign="top">Director</TD>
  </TR>
  
  <TR valign="bottom">
      <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px"><DIV style="font-size: 1pt; border-top: 1px solid #000000">&nbsp;</DIV>
  Ilene H. Lang</DIV></TD>
      <TD>&nbsp;</TD>
      <TD align="left" valign="top">&nbsp;</TD>
  </TR>
  <TR valign="bottom"><!-- Blank Space -->
      <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">&nbsp;</DIV></TD>
      <TD>&nbsp;</TD>
      <TD align="left" valign="top">&nbsp;</TD>
  </TR>
  <TR valign="bottom">
  
  <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">/s/ Mary E. Makela</DIV></TD>
      <TD>&nbsp;</TD>
      <TD align="left" valign="bottom">Director</TD>
  </TR>
  <TR valign="bottom">
      <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px"><DIV style="font-size: 1pt; border-top: 1px solid #000000">&nbsp;</DIV>
  Mary E. Makela</DIV></TD>
      <TD>&nbsp;</TD>
      <TD align="left" valign="top">&nbsp;</TD>
  </TR>
  <TR valign="bottom"><!-- Blank Space -->
      <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">&nbsp;</DIV></TD>
      <TD>&nbsp;</TD>
      <TD align="left" valign="top">&nbsp;</TD>
  </TR>
  <TR valign="bottom">
  
  <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">/s/ Phyllis S. Swersky</DIV></TD>
      <TD>&nbsp;</TD>
      <TD align="left" valign="top">Director</TD>
  </TR>
  <TR valign="bottom">
      <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px"><DIV style="font-size: 1pt; border-top: 1px solid #000000">&nbsp;</DIV>
  Phyllis S. Swersky</DIV></TD>
      <TD>&nbsp;</TD>
      <TD align="left" valign="top">&nbsp;</TD>
  </TR>
  <!-- End Table Body -->
  </TABLE>
  </DIV>
  
  <P align="center" style="font-size: 10pt"><!-- Folio -->&nbsp;<!-- /Folio -->
  </DIV>
  <!-- PAGEBREAK -->
  <P><HR noshade><P>
  <H5 align="left" style="page-break-before:always">&nbsp;</H5><P>
  <DIV style="font-family: 'Times New Roman',Times,serif">
  <!-- link1 "EXHIBIT INDEX" -->
  <DIV align="center" style="font-size: 10pt; margin-top: 10pt"><B>EXHIBIT INDEX</B></DIV>
  
  <DIV align="center">
  <TABLE style="font-size: 10pt" cellspacing="0" border="0" cellpadding="0" width="100%">
  <!-- Begin Table Head -->
  <TR valign="bottom">
      <TD width="3%">&nbsp;</TD>
      <TD width="1%">&nbsp;</TD>
      <TD width="3%">&nbsp;</TD>
      <TD width="5%">&nbsp;</TD>
      <TD width="44%">&nbsp;</TD>
      <TD width="5%">&nbsp;</TD>
      <TD width="3%">&nbsp;</TD>
      <TD width="5%">&nbsp;</TD>
      <TD width="4%">&nbsp;</TD>
      <TD width="5%">&nbsp;</TD>
      <TD width="18%">&nbsp;</TD>
      <TD width="5%">&nbsp;</TD>
      <TD width="1%">&nbsp;</TD>
      <TD width="1%">&nbsp;</TD>
      <TD width="1%">&nbsp;</TD>
  </TR>
  <TR style="font-size: 8pt" valign="bottom">
      <TD>&nbsp;</TD>
      <TD>&nbsp;</TD>
      <TD>&nbsp;</TD>
      <TD>&nbsp;</TD>
      <TD>&nbsp;</TD>
      <TD>&nbsp;</TD>
      <TD nowrap align="center"><B>Filed with</B></TD>
      <TD>&nbsp;</TD>
      <TD nowrap align="center" colspan="7" style="border-bottom: 1px solid #000000"><B>Incorporated by reference</B></TD>
  </TR>
  <TR style="font-size: 8pt" valign="bottom">
      <TD nowrap align="center" colspan="3"><B>Exhibit</B></TD>
      <TD>&nbsp;</TD>
      <TD>&nbsp;</TD>
      <TD>&nbsp;</TD>
      <TD nowrap align="center"><B>this Form</B></TD>
      <TD>&nbsp;</TD>
      <TD>&nbsp;</TD>
      <TD>&nbsp;</TD>
      <TD nowrap align="center"><B>Filing date with</B></TD>
      <TD>&nbsp;</TD>
      <TD nowrap align="center" colspan="3"><B>Exhibit</B></TD>
  </TR>
  <TR style="font-size: 8pt" valign="bottom">
      <TD nowrap align="center" colspan="3" style="border-bottom: 1px solid #000000"><B>Number</B></TD>
      <TD>&nbsp;</TD>
      <TD nowrap align="center" style="border-bottom: 1px solid #000000"><B>Description</B></TD>
      <TD>&nbsp;</TD>
      <TD nowrap align="center" style="border-bottom: 1px solid #000000"><B>S-8</B></TD>
      <TD>&nbsp;</TD>
      <TD nowrap align="center" style="border-bottom: 1px solid #000000"><B>Form</B></TD>
      <TD>&nbsp;</TD>
      <TD nowrap align="center" style="border-bottom: 1px solid #000000"><B>SEC</B></TD>
      <TD>&nbsp;</TD>
      <TD nowrap align="center" colspan="3" style="border-bottom: 1px solid #000000"><B>number</B></TD>
  </TR>
  
  <!-- End Table Head -->
  <!-- Begin Table Body -->
  <TR valign="bottom">
      <TD nowrap align="right" valign="top">&nbsp;</TD>
      <TD align="right" valign="top">4.1</TD>
      <TD nowrap valign="top">&nbsp;</TD>
      <TD>&nbsp;</TD>
      <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">Amended and Restated Certificate
  of Incorporation of Art
  Technology Group, Inc.</DIV></TD>
      <TD>&nbsp;</TD>
      <TD align="left" valign="top">&nbsp;</TD>
      <TD>&nbsp;</TD>
      <TD align="right" valign="bottom">S-8</TD>
      <TD>&nbsp;</TD>
      <TD align="left" valign="bottom" nowrap>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;June&nbsp;12, 2003</TD>
      <TD>&nbsp;</TD>
      <TD nowrap align="right" valign="top">&nbsp;</TD>
      <TD align="right" valign="bottom">4.1</TD>
      <TD nowrap valign="top">&nbsp;</TD>
  </TR>
  <TR style="font-size: 10pt">
      <TD>&nbsp;</TD>
  </TR>
  <TR valign="bottom">
      <TD nowrap align="right" valign="top">&nbsp;</TD>
      <TD align="right" valign="top">4.2</TD>
      <TD nowrap valign="top">&nbsp;</TD>
      <TD>&nbsp;</TD>
      <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">Amended and Restated By-Laws of
  Art Technology Group, Inc.</DIV></TD>
      <TD>&nbsp;</TD>
      <TD align="left" valign="top">&nbsp;</TD>
      <TD>&nbsp;</TD>
      <TD align="right" valign="bottom">S-3</TD>
      <TD>&nbsp;</TD>
      <TD align="left" valign="bottom" nowrap>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;July&nbsp;6, 2001</TD>
      <TD>&nbsp;</TD>
      <TD nowrap align="right" valign="top">&nbsp;</TD>
      <TD align="right" valign="bottom">4.2</TD>
      <TD nowrap valign="top">&nbsp;</TD>
  </TR>
  <TR style="font-size: 10pt">
      <TD>&nbsp;</TD>
  </TR>
  <TR valign="bottom">
      <TD nowrap align="right" valign="top">&nbsp;</TD>
      <TD align="right" valign="top">4.3</TD>
      <TD nowrap valign="top">&nbsp;</TD>
      <TD>&nbsp;</TD>
      <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">Specimen common stock certificate</DIV></TD>
      <TD>&nbsp;</TD>
      <TD align="left" valign="top">&nbsp;</TD>
      <TD>&nbsp;</TD>
      <TD align="left" valign="bottom" nowrap>S-1/A</TD>
      <TD>&nbsp;</TD>
      <TD align="left" valign="bottom" nowrap>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;July&nbsp;13, 1999</TD>
      <TD>&nbsp;</TD>
      <TD nowrap align="right" valign="top">&nbsp;</TD>
      <TD align="right" valign="bottom">4</TD>
      <TD nowrap valign="top">&nbsp;</TD>
  </TR>
  <TR style="font-size: 10pt">
      <TD>&nbsp;</TD>
  </TR>
  <TR valign="bottom">
      <TD nowrap align="right" valign="top">&nbsp;</TD>
      <TD align="right" valign="top">4.4</TD>
      <TD nowrap valign="top">&nbsp;</TD>
      <TD>&nbsp;</TD>
      <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">Rights Agreement dated September
  26, 2001 between Art Technology
  Group, Inc. and Computershare
  investor Services, f/k/a
  EquiServe Trust Company, N.A.,
  as rights agent</DIV></TD>
      <TD>&nbsp;</TD>
      <TD align="left" valign="top">&nbsp;</TD>
      <TD>&nbsp;</TD>
      <TD align="right" valign="bottom">8-K</TD>
      <TD>&nbsp;</TD>
      <TD align="left" valign="bottom" nowrap>  &nbsp;&nbsp;&nbsp;October&nbsp;2, 2001</TD>
      <TD>&nbsp;</TD>
      <TD nowrap align="right" valign="top">&nbsp;</TD>
      <TD align="right" valign="bottom">4.1</TD>
      <TD nowrap valign="top">&nbsp;</TD>
  </TR>
  <TR style="font-size: 10pt">
      <TD>&nbsp;</TD>
  </TR>
  <TR valign="bottom">
      <TD nowrap align="right" valign="top">&nbsp;</TD>
      <TD align="right" valign="top">4.5</TD>
      <TD nowrap valign="top">&nbsp;</TD>
      <TD>&nbsp;</TD>
      <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">Art Technology Group, Inc.
  Amended and Restated 1996 Stock
  Option Plan</DIV></TD>
      <TD>&nbsp;</TD>
      <TD align="left" valign="top">&nbsp;</TD>
      <TD>&nbsp;</TD>
      <TD align="right" valign="bottom">10-K</TD>
      <TD>&nbsp;</TD>
      <TD align="left" valign="bottom">&nbsp;&nbsp;&nbsp;February&nbsp;27, 2009</TD>
      <TD>&nbsp;</TD>
      <TD>&nbsp;</TD>
      <TD align="right" valign="bottom">10.1</TD>
      <TD nowrap valign="top">&nbsp;</TD>
  </TR>
  <TR style="font-size: 10pt">
      <TD>&nbsp;</TD>
  </TR>
  <TR valign="bottom">
      <TD nowrap align="right" valign="top">&nbsp;</TD>
      <TD align="right" valign="top">5.1</TD>
      <TD nowrap valign="top">&nbsp;</TD>
      <TD>&nbsp;</TD>
      <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">Legal opinion of Foley Hoag LLP</DIV></TD>
      <TD>&nbsp;</TD>
      <TD align="left" valign="top">X</TD>
      <TD>&nbsp;</TD>
      <TD align="left" valign="top">&nbsp;</TD>
      <TD>&nbsp;</TD>
      <TD align="left" valign="top">&nbsp;</TD>
      <TD>&nbsp;</TD>
      <TD nowrap align="right" valign="top">&nbsp;</TD>
      <TD align="right" valign="top">&nbsp;</TD>
      <TD valign="top">&nbsp;</TD>
  </TR>
  <TR style="font-size: 10pt">
      <TD>&nbsp;</TD>
  </TR>
  <TR valign="bottom">
      <TD nowrap align="right" valign="top">&nbsp;</TD>
      <TD align="right" valign="top">23.1</TD>
      <TD nowrap valign="top">&nbsp;</TD>
      <TD>&nbsp;</TD>
      <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">Consent of Ernst &#038; Young LLP</DIV></TD>
      <TD>&nbsp;</TD>
      <TD align="left" valign="top">X</TD>
      <TD>&nbsp;</TD>
      <TD align="left" valign="top">&nbsp;</TD>
      <TD>&nbsp;</TD>
      <TD align="left" valign="top">&nbsp;</TD>
      <TD>&nbsp;</TD>
      <TD nowrap align="right" valign="top">&nbsp;</TD>
      <TD align="right" valign="top">&nbsp;</TD>
      <TD valign="top">&nbsp;</TD>
  </TR>
  <TR style="font-size: 10pt">
      <TD>&nbsp;</TD>
  </TR>
  <TR valign="bottom">
      <TD nowrap align="right" valign="top">&nbsp;</TD>
      <TD align="right" valign="top">23.2</TD>
      <TD nowrap valign="top">&nbsp;</TD>
      <TD>&nbsp;</TD>
      <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">Consent of Foley Hoag LLP
  (contained in Exhibit&nbsp;5.1)</DIV></TD>
      <TD>&nbsp;</TD>
      <TD align="left" valign="top">X</TD>
      <TD>&nbsp;</TD>
      <TD align="left" valign="top">&nbsp;</TD>
      <TD>&nbsp;</TD>
      <TD align="left" valign="top">&nbsp;</TD>
      <TD>&nbsp;</TD>
      <TD nowrap align="right" valign="top">&nbsp;</TD>
      <TD align="right" valign="top">&nbsp;</TD>
      <TD valign="top">&nbsp;</TD>
  </TR>
  <TR style="font-size: 10pt">
      <TD>&nbsp;</TD>
  </TR>
  <TR valign="bottom">
      <TD nowrap align="right" valign="top">&nbsp;</TD>
      <TD align="right" valign="top">24.1</TD>
      <TD nowrap valign="top">&nbsp;</TD>
      <TD>&nbsp;</TD>
      <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">Power of Attorney (included on
  the signature page of this
  registration statement)</DIV></TD>
      <TD>&nbsp;</TD>
      <TD align="left" valign="bottom">X</TD>
      <TD>&nbsp;</TD>
      <TD align="left" valign="top">&nbsp;</TD>
      <TD>&nbsp;</TD>
      <TD align="left" valign="top">&nbsp;</TD>
      <TD>&nbsp;</TD>
      <TD nowrap align="right" valign="top">&nbsp;</TD>
      <TD align="right" valign="top">&nbsp;</TD>
      <TD valign="top">&nbsp;</TD>
  </TR>
  </TABLE>
  </DIV>
  
  <P align="center" style="font-size: 10pt"><!-- Folio -->&nbsp;<!-- /Folio -->
  </DIV>
  </BODY>
  </HTML>
metadata_documents: [{"type": "S-8", "sequence": "1", "filename": "b74371atsv8.htm", "description": "ART TECHNOLOGY GROUP, INC.", "secsgml_size_bytes": 49000}]
metadata_filer: {"company-data": {"conformed-name": "ART TECHNOLOGY GROUP INC", "cik": "0001086195", "assigned-sic": "7372", "irs-number": "043141918", "state-of-incorporation": "DE", "fiscal-year-end": "1231"}, "filing-values": {"form-type": "S-8", "act": "33", "file-number": "333-157616", "film-number": "09644820"}, "business-address": {"street1": "ONE MAIN STREET", "city": "CAMBRIDGE", "state": "MA", "zip": "02142", "phone": "617-386-1000"}, "mail-address": {"street1": "ONE MAIN STREET", "city": "CAMBRIDGE", "state": "MA", "zip": "02142"}}
text: sv8
  As
  filed with the Securities and Exchange Commission on February
  27
  , 2009
  Registration No. 333-
  •
  UNITED STATES
  SECURITIES AND EXCHANGE COMMISSION
  Washington, D.C. 20549
  FORM S-8
  REGISTRATION STATEMENT
  UNDER
  THE SECURITIES ACT OF 1933
  Art Technology Group, Inc.
  (Exact name of registrant as specified in its charter)
  Delaware
  04-3141918
  (State or other jurisdiction of incorporation or organization)
  (I.R.S. employer identification no.)
  One Main Street, Cambridge, Massachusetts
  02142
  (Address of principal executive offices)
  (Zip code)
  Amended and Restated 1996 Stock Option Plan
  (Full title of the plan)
  Robert D. Burke
  President and Chief Executive Officer
  Art Technology Group, Inc.
  One Main Street
  Cambridge, Massachusetts 02142
  (Name and address of agent for service)
  (617) 386-1000
  (Telephone number, including area code, of agent for service)
  Copies to:
  John D. Patterson, Jr., Esq.
  Robert W. Sweet, Jr., Esq.
  Foley Hoag
  LLP
  Seaport World Trade Center West
  155 Seaport Boulevard
  Boston, Massachusetts 02210
  Telephone: (617) 832-1000
  Telecopy: (617) 832-7000
  Indicated by check mark whether the registrant is a large accelerated filer, an accelerated
  filer, a non-accelerated filer, or a smaller reporting company. See the definitions of "large
  accelerated filer," "accelerated filer" and "smaller reporting company" in Rule 12b-2 of the
  Exchange Act. (Check one):
  Large accelerated filer
  o
  Accelerated filer
  þ
  Non-accelerated filer
  o
  Smaller reporting company
  o
  (Do not check if a smaller reporting company)
  CALCULATION OF REGISTRATION FEE
  Title of
  Amount
  Proposed maximum
  Proposed maximum
  Amount of
  securities to be
  to be
  offering price
  aggregate
  registration
  registered
  registered
  per share
  offering price
  fee
  Common stock, $0.01 par
  value (1)
  6,400,000 (2)(3)
  $2.395 (4)
  $15,328,000
  $602.39
  (1)
  Each share includes one right to purchase shares of the Registrant's series A junior
  participating preferred stock pursuant to the terms of a Rights Agreement, dated September 26,
  2001, between the Registrant and EquiServe Trust Company, N.A.
  (2)
  Represents shares of the Registrant's common stock issuable pursuant to awards granted under
  the Amended and Restated 2006 Stock Option Plan of Art Technology Group, Inc. (the "
  2006 Stock
  Plan
  ").
  (3)
  Pursuant to Rule 416(a) under the Securities Act, this Registration Statement shall also
  cover any additional shares of the Registrant's common stock that become issuable under the
  1996 Plan by reason of any stock dividend, stock split, recapitalization or other similar
  transaction effected without the receipt of consideration that increases the number of the
  Registrant's outstanding shares of common stock.
  (4)
  The proposed maximum offering price per share has been estimated in accordance with Rule
  457(c) and Rule 457(h) under the Securities Act solely for the purpose of calculating the
  registration fee of shares reserved for future issuance based on the average of the high and
  low price of the Registrant's common stock as quoted on the
  Nasdaq Global Market on February 25, 2009.
  This Registration Statement is filed pursuant to General Instruction E to Form S-8 by Art
  Technology Group, Inc., a Delaware corporation (the "
  Registrant
  ") to register 6,400,000 shares of
  the Registrant's common stock, $0.01 par value per share, issuable pursuant to the Registrant's
  Amended and Restated 1996 Stock Option Plan ("
  2006 Stock Plan
  "), which shares are in addition to
  those previously registered on the Forms S-8 (File Nos. 333-83325, 333-38926, and 333-73664) filed
  with the Securities and Exchange Commission on July 21, 1999, June 9, 2000 and November 19, 2001,
  respectively (the "
  Original Registration Statement
  s
  ").
  PART II
  INFORMATION REQUIRED IN THE REGISTRATION STATEMENT
  Item 3. Incorporation of Documents by Reference.
  The Registrant incorporates herein by reference the contents of the previously filed Original
  Registration Statements and the following documents filed with the Securities and Exchange
  Commission:
  (a)
  the Registrant's Annual Report on Form 10-K for the year ended December 31,
  2008, as filed with the Commission pursuant to Section 13 of the Exchange Act;
  (b)
  the Registrant's Current Reports on Form 8-K filed on February 5, 2009; and
  (c)
  the description of the Registrant's common stock and related preferred stock
  purchase rights contained in the Registrant's registration statement on Form 8-A filed
  on July 12, 1999, together with amendments and reports filed for the purpose of
  updating that description, including Amendment No. 1 to Form 8-A filed on October 2,
  2001.
  All documents subsequently filed by Registrant pursuant to Sections 13(a), 13(c), 14 and 15(d)
  of the Exchange Act, prior to the filing of a post-effective amendment which indicates that all
  securities offered have been sold or which deregisters all securities then remaining unsold, shall
  be deemed to be incorporated by reference in this registration statement and to be a part hereof
  from the dates of filing of those documents.
  Under no circumstances will any information filed under items 2.02 or 7.01 of Form 8-K be
  deemed incorporated herein by reference unless such Form 8-K expressly provides to the contrary.
  You may request a copy of the filings incorporated by reference herein, at no cost, by writing
  or telephoning the Registrant at:
  Art Technology Group, Inc.
  One Main Street
  Cambridge, Massachusetts 02142
  (617) 386-1000
  You should rely only on the information provided or incorporated by reference in this
  registration statement or any related prospectus. The Registrant has not authorized anyone to
  provide you with different information. You should not assume that the information in this
  registration statement or any related prospectus is accurate as of any date other than the date on
  the front of the document.
  Item 4. Description of Securities.
  Not applicable.
  Item 5. Interests of Named Experts and Counsel.
  The validity of the securities registered hereby is being passed upon for the Registrant by
  Foley Hoag LLP, Boston, Massachusetts.
  Item 6. Indemnification of Directors and Officers.
  Incorporated by reference to the Original Registration Statements.
  Item 7. Exemption from Registration Claimed.
  Not applicable.
  Item 8. Exhibits.
  The following exhibits are included as part of this registration statement.
  Filed with
  Incorporated by reference
  Exhibit
  this Form
  Filing Date with
  Exhibit
  Number
  Description
  S-8
  Form
  SEC
  Number
  4.1
  Amended and Restated Certificate
  of Incorporation of Art
  Technology Group, Inc.
  S-8
  June 12, 2003
  4.1
  4.2
  Amended and Restated By-Laws of
  Art Technology Group, Inc.
  S-3
  July 6, 2001
  4.2
  4.3
  Specimen common stock certificate
  S-1/A
  July 13, 1999
  4
  4.4
  Rights Agreement dated September
  26, 2001 between Art Technology
  Group, Inc. and Computershare
  Investor Services f/k/a
  EquiServe Trust Company, N.A.,
  as rights agent
  8-K
  October 2, 2001
  4.1
  4.5
  Art Technology Group, Inc.
  Amended and Restated 1996 Stock
  Option Plan
  10-K
  February 27, 2009
  10.1
  5.1
  Legal opinion of Foley Hoag LLP
  X
  23.1
  Consent of Ernst & Young LLP
  X
  23.2
  Consent of Foley Hoag LLP
  (contained in Exhibit 5.1)
  X
  24.1
  Power of Attorney (included on
  the signature page of this
  registration statement)
  X
  Item 9. Undertakings.
  Incorporated by reference to the Original Registration Statements.
  SIGNATURES
  Pursuant to the requirements of the Securities Act of 1933, the registrant certifies that it
  has reasonable grounds to believe that it meets all of the requirements for filing on Form S-8 and
  has duly caused this registration statement to be signed on its behalf by the undersigned,
  thereunto duly authorized, in the City of Cambridge, Commonwealth of
  Massachusetts, on this 27
  th
  day
  of February, 2009.
  Art Technology Group, Inc.
  By:
  /s/ Robert D. Burke
  Robert D. Burke
  President and Chief Executive Officer
  POWER OF ATTORNEY
  KNOW ALL BY THESE PRESENTS that each individual whose signature appears below hereby
  constitutes and appoints Robert D. Burke and Julie M.B. Bradley, and each of them, his or her true
  and lawful attorneys-in-fact and agents with full power of substitution, for him or her and in his
  or her name, place and stead, in any and all capacities, to sign any and all amendments (including
  post-effective amendments) to this registration statement, and to file the same, with all exhibits
  thereto, and all documents in connection therewith, with the Securities and Exchange Commission,
  granting unto said attorneys-in-fact and agents, and each of them, full power and authority to do
  and perform each and every act and thing which they, or any of them, may deem necessary or
  advisable to be done in connection with this registration statement, as fully to all intents and
  purposes as he or she might or could do in person, hereby ratifying and confirming all that said
  attorneys-in-fact and agents or any of them, or any substitute or substitutes for him or her, or
  any or all of them, may lawfully do or cause to be done by virtue hereof.
  Pursuant to the requirements of the Securities Act, this registration statement has been
  signed by the following persons in the indicated capacities as of
  this 27
  th
  day of February, 2009.
  Signature
  Title
  /s/ Robert D. Burke
  President, Chief Executive Officer and Director
  Robert D. Burke
  (Principal
  Executive Officer)
  /s/ Julie M.B. Bradley
  Senior Vice President and Chief Financial Officer
  Julie M.B. Bradley
  (Principal
  Financial and Accounting Officer)
  /s/ Daniel C. Regis
  Chairman of the Board
  Daniel C. Regis
  /s/ Michael A. Brochu
  Director
  Michael A. Brochu
  /s/ David B. Elsbree
  Director
  David B. Elsbree
  /s/ John R. Held
  Director
  John R. Held
  /s/ Ilene H. Lang
  Director
  Ilene H. Lang
  /s/ Mary E. Makela
  Director
  Mary E. Makela
  /s/ Phyllis S. Swersky
  Director
  Phyllis S. Swersky
  EXHIBIT INDEX
  Filed with
  Incorporated by reference
  Exhibit
  this Form
  Filing date with
  Exhibit
  Number
  Description
  S-8
  Form
  SEC
  number
  4.1
  Amended and Restated Certificate
  of Incorporation of Art
  Technology Group, Inc.
  S-8
  June 12, 2003
  4.1
  4.2
  Amended and Restated By-Laws of
  Art Technology Group, Inc.
  S-3
  July 6, 2001
  4.2
  4.3
  Specimen common stock certificate
  S-1/A
  July 13, 1999
  4
  4.4
  Rights Agreement dated September
  26, 2001 between Art Technology
  Group, Inc. and Computershare
  investor Services, f/k/a
  EquiServe Trust Company, N.A.,
  as rights agent
  8-K
  October 2, 2001
  4.1
  4.5
  Art Technology Group, Inc.
  Amended and Restated 1996 Stock
  Option Plan
  10-K
  February 27, 2009
  10.1
  5.1
  Legal opinion of Foley Hoag LLP
  X
  23.1
  Consent of Ernst & Young LLP
  X
  23.2
  Consent of Foley Hoag LLP
  (contained in Exhibit 5.1)
  X
  24.1
  Power of Attorney (included on
  the signature page of this
  registration statement)
  X