Email a copy of "Welcome to Web 2.0, Mark Zuckerberg style." to a friend.
Dozens of the world’s biggest media moguls and investment bankers, dressed in perfectly pressed suits, mingled in the lobby of the Pierre Hotel in Manhattan yesterday at the annual FourSquare conference.
And then there was Mark Zuckerberg, the 22-year-old chief executive of the social networking site Facebook, wearing Adidas flip-flops —...
