Apparently the Call of Duty: Black Ops 'Annihilation' map content pack is now available on Xbox Live! Marketplace, as usual it will cost you Xbox gamers 1,200 Microsoft Points.

The Annihilation content pack’s new maps include:
• "Hangar 18," located in the highly classified military base of Area 51, where gamers will fight through experimental weapons labs, the SR-71 test hangar and a mysterious autopsy room.
• "Drive-In," where players experience close-quarters combat through a 1960's American Drive-In theater, complete with a snack shack and a classic arcade.
• "Silo," where-in gamers can infiltrate a massive secret Soviet nuclear missile site under construction within a multi-level battleground.
• "Hazard," located on the cliff sides of Cuba, gamers can explore a coastal golf course fit for a Dictator, where stocked clubhouses and manicured fairways meet snipers hidden in sand traps.
• "Shangri-La," the all-new Zombies experience, transports players into a mythical paradise overrun with the undead. Our Heroes will come face-to-face with new species of zombies and navigate through a treacherous labyrinth of underground caverns, all set within a legendary shrine lost in an exotic jungle.