Mark Zuckerberg, founder and chief executive of Facebook, delivers a keynote address at the company's annual conference in San Francisco, California, July 23, 2008. Zuckerberg, 24, told an audience of 1,000 industry executives , software makers, media, and his mother and father at the conference here of plans to let Facebook features run on affliated sites off the social network.
REUTERS/Kimberly White (UNITED STATES)