well i haven't been folding lately due to the heat also. i just reinstalled windows 7 on one of my machines, and i downloaded the new client and installer. i must say, a lot of things have changed.
this machine has 2 gpus (old 260s), and i set it to just do gpu folding. it looks like it recognized both gpus and is now folding 2 work units. we'll see how it works over time, but i'll give this a shot for now.