If you asked Cameron and Tyler Winklevoss, the twin brothers who cofounded ConnectU, whether Mark ­Zuckerberg, the founder of Facebook, deserved to be one of this year's TR35, they'd say no.

We named Zuckerberg one of 2007's 35 leading innovators under the age of 35 because Facebook is the best of the social-networking websites, and social networking is the fastest-growing phenomenon on the Internet. As of July 2007, 30 million people had registered with Facebook. An older social network, MySpace, has more than 100 million people registered, but Facebook is cooler. Its design (for which Zuckerberg is responsible) is more elegant and functional, and its features are more useful and more fun. To the young and hip, Facebook appears to enjoy the future's blessing, but MySpace already looks dated and ugly.