McAfee acquired Foundstone in October 2004 according to this article I Googled: http://investor.mcafee.com/releasedetail.cfm?ReleaseID=348826
I would imagine they started offering it shortly after the ink was dry on the contract. But then I am no expert. I just saw that nobody had responded to your question so thought I'd chip in until they do.
Message was edited by: Ex_Brit on 21/05/11 7:55:10 EDT AM