Turning a profit with your startup can't be all that hard. Just ask 15-year-old Hansup Yoon. He created a community discussion site called ZuneBoards in 2006 using free MyBBoard software, got 60,000 users, earned $1,000 a month from Google ads for a couple years, and then sold it for $62,000 this summer. "It is so easy to make money on the Internet," Yoon told the Boston Herald. "I only spent 30 minutes online a day on ZuneBoards."