The solution to the missing textures, incomplete geography, and freezing issues that plagued yesterday's launch to The Pitt for the Xbox 360 is now only a delete and a download away. Simply go to Settings->System Settings->Memory on your Xbox 360, select Fallout 3, and then select Fallout 3: The Pitt. Delete what you've got there, re-download the file, and you should be good to go.
While the situation surely did suck, we've got to give Bethesda kudos for getting the issue resolved quickly, especially in the middle of the Game Developers Conference. Good on ya, Bethesda.
Fallout 3: The Pitt is now available (again) [Xboix Live's Major Nelson]