ReadWrite: "Earlier this month, LinkedIn held its third annual LinkedIn Intern Hackday. The popular event, which offers the winner a $10,000 scholarship, is packed with young people hopped up on caffeine, struggling to finish an app before the 24-hour deadline.
There are a lot of silly concepts, as you’d expect from college-age interns. A program for “creeping” on your friends (or strangers) by snapping hidden shots of them while you ostensibly make a phone call. A virtual door sock to advise your roomies to stay away for a while.
And every now and then, out comes an app that could change the world."