
Today Facebook boasts 66 million active users. Estimated annual sales: $150 million. Expanding beyond being a college-only message system and photo album; now courting users to 55,000 different high school, business and city networks. Last October, Microsoft bought 1.6% stake for $240 million and this deal led many analysts to suggest the company is worth $15 billion.
His net worth is estimated to be $1.5 billion, which has made this tech savvy boy the youngest billionaire on earth and possibly the youngest self-made billionaire ever.