Still playing a shitload, and I will probably continue to. The multi-player may be a joke to some, but i've never been a serious fan of online fps games, and I find mw2 to be the best, I've tried all the others TF2, BFBC2, Halo 3, Halo Reach (beta), CS, i've forgotten the rest, but you get the point, and I find MW2 the best.
Now if were talking local MW2, James Bond: Nightfire, and Halo 3 are my favorites.