We're still left wondering about its "winter 2010" release date, but Battlefield Bad Company 2 Vietnam has now been priced at $15 (12.99, 9.99, 1200 MSP). The DLC expansion will add four new maps, 15 new weapons and six vehicles to fit in with its setting. Era-specific items include the M79 grenade launcher, Navy SEAL XM22 machine gun, Huey helicopter and the ability to "RUN, FORREST! RUN!" from all the bullets and explosions.

The DLC also features a '60s soundtrack comprising 49 tracks across eight in-game radio channels. So, just recline on the battlefield and listen to "Ride of the Valkyries" as the destruction occurs all around.
Source- Joystiq