It's official. Sources tell Rock Daily that the Grateful Dead will play a fundraiser for Barack Obama on October 13 at Penn State. The band, including Bob Weir, Bill Kreutzmann, Phil Lesh and Mickey Hart, are planning to rehearse next week to prep for the show in one of the more hotly contested presidential swing states with Warren Haynes on lead guitar. Phil Lesh's son, an Obama volunteer, lined up the gig. "They are all totally committed to the show," said a friend of Jerry Garcia.