I've played through crysis twice now, all settings on high at 1440x900 no AA. I have a core duo 6800 extreme, 2gb RAM and 1950xt crossfire. My first play through was at mostly medium settings and it was a bit smoother but I don't think there was a huge difference and I found it more than playable on high.
I don't tend to benchmark stuff though so I can't say what fps I am getting I find different games play better at different framerates anyway. I was told FRAPS reduces framerate in Crysis too but that may have been fixed. Still I have to agree at 1900x1200 resolution for a game like this it will be the next gen cards that are going to be needed.
To say it is the worst engined game ever is a gross overstatement. I don't understand why people have to make such extreme statements I think it is just disappointing when suddenly your high spec system that you spent so much on can't manage max settings for something. I remember when my system got overtaken and it was frustrating. Every time a game comes out that is demanding for the people with high spec machines you get lots of people saying how terrible it is, but it isn't neccessarily true.
Yes it is demanding but you have to look at what is being rendered, foliage and trees are very demanding, especially if you want trees that can be shot down and destructable buildings. Very high textures and a lot of teture loading going on in this game, so good GFX RAM seems to help a lot, there was no crossfire support at first but it has improved of late, I can't speak for nvidia drivers.