Constance Loizos and Elise Ackerman write:For the 1,000 attendees at the third Web 2.0 conference in San Francisco, there was ample opportunity to network, nosh, check out new startups and mingle with some of the biggest names in the technology industry.

Yet this year’s conference was perhaps most notable for its high-profile speakers, which included Ross Levinsohn, CEO of Fox Interactive; Ram Shriram, one of Silicon Valley’s most prominent angels — he was Google’s first investor; and Roger McNamee, a prominent investor and cofounder of Elevation Partners.