Today in rich people news: Palo Alto-based billionaire Mark Zuckerberg has promised to give away a large portion of his fortune. The announcement is part of the Giving Pledge, an effort started by fellow college dropout Bill Gates to get the world's richest to be more charitable. Others pledging unspecified amounts to unnamed recipients currently include: CNN founder Ted Turner and film director George Lucas, who still owes us each eight bucks for The Phantom Menace. [AP/Chron]