Fallout 3 - Mothership Zeta Preview

MTV has a brief preview/interview on Mothership Zeta with input from Jeff Gardiner.  Here's a bit on weapons:

Mothership Zeta is full of the most high tech weaponry in the game. It includes a Shock Baton for melee fighters, multiple new firearms including an Alien Atomizer, a pistol, and the Alien Disintegrator, a new rifle. There's also a new grenade type, a Cryo Grenade, which freezes enemies for a short period of time. On top of that there are new unique weapons, and a new heavy weapon