I tried it for a while at 1440x900 with all the effects on medium. I think it slowed the game down to <15 fps (nigh unplayable for a shooter), but I was able to see snipers in the grass that I wasn't able to see at a lower res.

he also wrote: "The story is good, very good, better than the previous CoD's I've
played. /snip/ The ending was probably one of the most satisfying for an FPS
I've ever had in a CoD game. I'll tell you this much... It doesn't end
with you just taking over some building in the centre of town. It's a
lot more central to the story."

Have you found the easter egg at the end? I don't know about the PC version, but there's an extra mission on the PS3 version. You gotta sit through the credits, though.

Infinity Ward deserves serious props for this one. The one criticism I had (and I've read on game sites) is that the single-player story is kinda short. But it is immersive and very well done. And for me, multiplayer is where it's at. COD4 excels at that.

Since I've purchased a PS3, I second eatgnome's sentiments about a keyboard and mouse being the only way to go against others who use that setup. For instance, on the Windows version, you can hide behind cover and lean out to fire at or look for enemies. On the PS3, because there are only so many controls available, they left this capability off. (I think they could've used the six-axis feature to give you this ability, but oh well.) I would assume that if you were able to get COD4 to work with a game pad, you'd still be at a similar disadvantage.