I have a few options:
1. Run it on MilkyWay but that project was tricky to setup last time I ran it with the 4870 GPU.
2. Run it on a Gentoo64 box but that needs my son to set the thing up for me. I have two Q6600s that are spare at the moment, one from the previous server that got replaced by the new dual E5520 Xeon server (its running WEP) and the other from the Shuttle box that caught fire recently. Thus I need a couple of cases, power supplies, some RAM and I'm sure I can find a HDD or two somewhere. The Shuttle had 4GB Corsair DDR2 onboard so maybe I need to look at a motherboard that will use that with one of the Q6600s.
3. Run it on Collatz as that application is brilliant for points.