I've seen this on other forums as well and always thought it was a good idea, but when the SMP and GPU clients first came out it pretty much killed it because the old p3/4 and athlon/xp etc that people were willing to donate put out so little in comparison to the high performance clients that people stopped running them. But I think hardware is getting to a point that this idea will work again, multi core cpus are the norm today and people are dumping duals to get quads etc, and even a low end gpu such as an 8600gt/gts will get 1000-1500 ppd easily
to keep things fair and easy to keep track of I think each donated machine should crunch under its own designated user name such as, CDF_01, CDF_02, etc...
I'd be willing to donate an old 939 mobo with a pcie slot, a 939 sempron 3200, and a 4.3gb hdd which is the perfect size for a dedicated winxp folder, I'll have to look around I may have more goodies too.
if we could get that stuff together with a PSU, an nvidia 8xxx or better video card, some ddr400, some sort of cooling device (the sempron isn't going to need much :p) and someone willing to host it, we could have CDF_01 doing gpu folding and some wcg as well
I could also keep the first post updated with who is hosting what, who donated each part, parts people are offering, parts people need, etc. to keep things organized