The pack releases on December 21 to the tune of 800 Microsoft points, or ten dollars for those of you who live in the real world with your real money. The description released today said that the DLC "has platers working alongside three other captured wastelanders to recover the treasure of the Sierra Madre Casino. Sounds like fun to me.
If the pack is going to be anything like the amazing ones that were released for Fallout 3 I'll be on this the second it comes out. There is talk of new terrain, foes and choices. I doubt this one will continue the main storyline, those who have beaten the game know what I'm talking about, but it'll be fun nonetheless. Mark your calendars.