I'm having pretty good results with Windows 7 in Boot Camp without any special drivers. I had to do the external monitor trick to get Windows 7 to install, but once I did that, it automatically downloading a ATI 4850 driver and it's working just fine.
I'm running Crysis with all High settings, though I do have to lower the resolution to something like 1600x900. At full resolution, the game slows down quite a bit. Other less demanding games run very good at full resolution.
I'm not really expecting to get better results when Apple releases new boot camp drivers, but maybe I'll be pleasantly surprised?
I'm also running a good number of casual games with Windows 7 in Parallels and they run just fine. I'm talking games like Plants vs Zombies, Defense Grid, and the like. Demanding 3D games obviously need to be run in Boot camp.
Any other experiences?