from SC 13G/A
1 page
<page> Cusip No. 218875 10 2 Exhibit I Agreement Pursuant to Rule 13d-1(k)(1) Under the Securities Exchange Act of 1934, as Amended, the Undersigned Hereby Agree That Only One Statement Containing the Information Required by Schedule 13g Need Be Filed With Respect to the Ownership by Each of the Undersigned of the Shares of Common Stock of Corio, Inc. Executed as a Sealed Instrument This 14 Day of February, 2006. Greylock IX Limited Partnership By: Greylock IX GP Limited Partnership General Partner By: /S/ William W. Helman William W. Helman Co-Managing General Partner By: /S/ William S. Kaiser William S. Kaiser Co-Managing General Partner Greylock IX GP Limited Partnership By: /S/ William W. Helman William W. Helman Co-Managing General Partner Greylock XI Limited Partnership By: Greylock XI GP Limited Partnership General Partner By: /S/ William W. Helman William W. Helman Co-Managing General Partner Greylock XI-A Limited Partnership By: Greylock XI GP Limited Partnership General Partner By: /S/ William W. Helman William W. Helman Co-Managing General Partner Greylock XI GP Limited Partnership By: /S/ William W. Helman William W. Helman Co-Managing General Partner By: /S/ Aneel Bhusri Aneel Bhusri Co-Managing General Partner /S/ William W. Helman William W. Helman Page 14 of 15 Pages <page> Cusip No. 218875 10 2 /S/ William S. Kaiser William S. Kaiser /S/ Aneel Bhusri Aneel Bhusri Page 15 of 15 Pages
