Battlefield: Bad Company 2 Vietnam hid its "winter 2010" launch date so cleverly in the brush that we're not sure if it can even find it now. It turns out that Russian intelligence (from 32bita) may be able to give us some intel on the game. Sure, it's not a release date, but some spy has posted all the weapons and vehicles that can be found in the multiplayer expansion.
Fair warning: it's spoilery. As in: these are the guns you'll get. Granted, there are many guns like them, but these are the ones that will be yours.