Co-founder, PayPal; founder, Slide; vice president of engineering, Google
Rank change: Down
Levchin sold Slide.com to Google for a reported $182 million. He banked a reported $39 million, and Google gets a product wizard who understands the social web -- and has engineering cred among Google's execs.
NEXT: 32. Eric Braverman
Last updated October 14 2010: 1:25 PM ET