Though we've only seen free DLC released for Mass Effect 2 so far, some premium content is on the way as well. Kasumi's Stolen Memory will be available for purchase on April 6th.

The paid DLC pack adds a female thief character named Kasumi that Commander Shepard can recruit for his motley crew. You'll be asked to assist her on a new mission, in which you match wits with a fearsome...art collector. Joystiq reports that the new content adds about an hour and a half to the game.

A new "Locust" submachine gun, flashbang grenade loyalty power, and Achievement will be included in the pack as well. No word on price yet.