The O'Reilly Open Source Conference is one of the premier events for hackers, executives, users, and industry analysts to share and discuss open source trends, strategies, and perspectives. It has been so successful for so long that Microsoft couldn't let it continue without becoming a top sponsor, which they have now been for a number of years. One thing that sponsorship buys is a keynote speaking slot, and Microsoft's Sam Ramji took that slot on the final day of the 2008 conference.
Sam's message to the audience, which included leading open source companies, open source project leaders, board members, venture capitalists, etc., is that Microsoft is truly, truly interested in