Announced once before, PDZ fans were a bit upset when the maps they had been waiting for ended up not being available, but now, they are on the Xbox Live Marketplace, so jump on and for 500 MS Points you can download four new multiplayer maps. The names of the maps are Plaza, Trench, Rooftops and GasPlant.
I really think that such content should have been released for free, but the Xbox 360 seems to be all about micropaymenting its users to death to get features and content that should have been in the $50-$70 game from the start.