Why Old friends Matter

It's hard not to wonder just what the Cook parents fed their kids, Geoff, Dave, and Catherine. Geoff founded a business while attending Harvard—and sold it in 2002 at the ripe age of 24. That inspired Catherine and Dave to launch myYearbook, a social networking site for high school kids, in 2005. When the site, based in New Hope, Pennsylvania, took off, Geoff stepped in as CEO. (Dave spent the past four years at college in Colorado but recently returned.) Last year, myYearbook, one of the nation's 25 most-trafficked websites, merged with Quepasa, a publicly traded company that runs social networking sites aimed at Latinos, in a $100 million deal. The Cooks still run the show and are focused on graduating to a global market. As told to Liz Welch.