Xbox Live's Major Nelson and Playstation.blog have confirmed that Call of Duty: World at War Map Pack #1 will be available today on each system's DLC channels respectively, at the going rate of $10. Included with the pack:

"The Call of Duty: World at War Map Pack 1 expands the addictive COD multiplayer experience with four new maps. Players fight through the burning streets of Berlin in “Nightfire” and take up battle positions in fortified Japanese bunkers in "Knee Deep." “Station” offers a bombed out underground train station, and the Nazi Zombies return in “Verrückt” (Zombie Asylum) featuring more weapons, new Perks-a-Cola machines and electroshock defenses."

More co-op Nazi Zombies? You betcha. Check the trailer for more details including a wave of crawling undead fascists.

Call of Duty: World at War Map Pack 1 Trailer