Well, the cheap Powercolor 4650 card in my PC topped out at a whopping 27.1 Mh/s. That's with Windows 7 set for best performance, and the GPU and RAM at max in ATI Catalyst. Then I turned it down so the card doesn't fry.

Despite my incredibly low hashing speed, I've got 39 shares on BTC Guild. So at least that's working.

Now that I've figured out basic mining... might as well build a rig with some real cards. Until it becomes a financial loss to pay for the electricity, screw the calculators! This is fun.