Campus Inc.

Today's hottest start-ups are being founded by surprisingly young -- and surprisingly connected -- entrepreneurs. These companies are being launched by students at graduate business schools that teach entrepreneurship. Everyone wants in on the explosion in campus start-ups, and no wonder. These brash young founders are backed by powerful networks of investors and mentors, including professors and alumni. They're the new elite, creating some of the highest-potential start-ups around.

The New Entrepreneurial Elite: