Age: 28
Company: Foursquare
Net Worth: $80 Million (projected)
What's the Deal?: A former Sony Music software architect, Selvadurai changed the way we see our cities when he created Foursquare. With nearly 275,000 users in less than one year, the app is one of the most popular iPhone and Android apps, welcoming users to highlight and review locations in any city. Selvadurai has already inked deals with HBO, Bravo, and Zagat, which will allow users to earn rewards points for checking into restaurants and other hotspots. Now all he needs is a less sensual press photo.