Jailbreaker George Hotz, better known as Geohot, has started working at Facebook based on a post found at his personal page (friends only). After P0sixninja (Josh Hill) claimed in an interview (below) to have been rebuffed on a challenge to Hotz to find an iPad 2 boot ROM exploit because of Hotz's Facebook job, Techmeme's Gabe Rivera dug through the Facebook personal profile and found confirmation that the device hacker had started work in May and made it public on June 17. What role he has or what projects he's developing are both still unknowns.