For all twelve of you who might actually care, the new Perfect Dark Zero Multiplayer Map Pack is now available on Xbox Live. The pack sells for 500 points and includes the following frag locales:

Plaza: Test your skills in a labyrinth of roofs, tunnels, and alleyways.
Trench: Unload in the desert at this archaeological expedition turned battlefield.
Rooftops: Watch your back in this killing ground, where danger awaits around every corner.
Gas Plant: Hide out amongst the pipes inside, or take you chances out in the snow.

The single-player campaign of PDZ was pretty disappointing, but these new maps should add a bit of juice to the online game.