This idea was borrowed from ocforums.com
They have a program called Build a Rig.
It works like this:
Any member can donate any computer part.
Once all the parts needed are collected, one person would build the computer.
Once the machine is up and running, a trusting member can take it and Fold until it runs out or when the performance of the machine is so low compared to what's available at that moment.
I am not sure what parts everyone have here, but I usually have hardware laying around here and there.