Mark Zuckerberg, founder and CEO 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 affiliated sites off the social network. REUTERS/Kimberly White (UNITED STATES)