I just BootCamped my iMac 24" Alu. w/ 2GB RAM and a decent [75GB] partition. Not really any problems. I use Vista Home Premium. Obviously, it's much more laggy than Leopard (LEOPARD RULLLESSS!). I use it for flight sim, oblivion other games, and windows coding, c++, c# etc. It's good, to an extent. The fact that it's a necessity makes it more livable.
I haven't had any driver issues - just used the leopard DVD for basic software regarding my Mac.
Good Luck to all those who need or want to install it. It's easy: and that's talking about windows. :S