Official word on the delay emerged via the game's official site,
which lists the PC and Xbox 360 editions for release on May 6 and the PlayStation 3 version for "Spring." Amusingly, Joystiq notes that the site was briefly listing all three as "out now."
Update: The game's official site has once again been revised, with all three versions--PC, PlayStation 3, Xbox 360--now listed for "Spring, 2010."
This marks the second major delay for the game, originally due in February 2009.