IncGamers have some info on Fallout 3's DLC.
More information.We recently reported that Operation: Anchorage was imminent, but now we know just that little bit more. Basically it's a trip into the history of Fallout 3 and is a counter-offensive training simulation used by the government to stop the Chinese army rising to power again.
The focus of the DLC pack will be on stealth and combat, and having lost all resources, adventurers will have to survive within the simulator’s parameters.
As well as new armour, weapons and tools, there will be a Covert Ops perk as well as new achievements. No trophies as there are still no plans for a PS3 DLC package, so this will only apply to PC and 360 users.