Meet the Facebook Mafia

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You probably already know about the PayPal Mafia—the influential and wealthy group of former PayPal executives that spawned many of Web 2.0's biggest hits. But soon, there may be a new generation of Silicon Valley start-up bosses in town.

When Facebook goes public, these current and former Facebookers-turned-entrepreneurs and venture capitalists will be worth billions. What's more, this group is rich in ideas and connections. So when they're not backing promising start-ups, you can bet they'll be tinkering on something of their own. Here are the Mafiosos to watch.
—John McDermott