If all goes as planned, Facebook will finally pull the trigger later this month on its long-salivated-over IPO. The deal could value the company in the neighborhood of $100 billion, making founder and CEO Mark Elliot Zuckerberg's own unusually large stake worth $25 billion. It is a huge sum, even in context. Zuckerberg's impending fortune is more money than Wal-Mart's 10,000-plus stores made last year. It's more than Wall Street paid in bonuses to New Yorkers last year. And it has been amassed in only eight years by a 27-year-old who not long ago passed out business cards reading "I'm CEO, bitch."