wow. just installed this game and it brought my system to its knees. evidently the engine in this is some next level shit, using some of the same technologies Doom3 is going to have. It was like a slideshow at 1024x768. It seems as though there are other people complaining of shit performance in Ion Storm's forums, so maybe this is something that needs to be resolved.
If not I'm going to pick up ati's r420 before playing this. the in game cutscenes are pretty impressive, so no point in ruining the game by playing it at less than full effect.