NYT has a story on the third founder of Youtube who likes to remain in academia while helping found companies.
 Mr. Karim is the third of the three founders of the video site YouTube, which Google has agreed to buy for $1.65 billion. He was present at YouTube’s creation, contributing some crucial ideas about a Web site where users could share video. But academia had more allure than the details of turning that idea into a business.
An uncommon scenario.