Yeah the last album had maybe 2 memorable songs to me. Aenima was unbelievable though. Maynard can sound angrier than any metal singer around...
I can't picture their songs fitting in with Doom 3 though. Too bad Reznor isn't doing it. I thought his work with Quake 1 was one of the main reasons for it's superior creepy atmospheric feel. Especially the zombie groans and the windy sound. Contrast that with Quake 2, God that was horrible sound, I remember people were putting out sound mods to try and improve it, and it did improve it!