I guess I now technically have a Folding Farm.
The GeForce 8800GS I picked up for $69.99 AR from Newegg arrived and it's now happily folding away in my budget box.
I may end up retiring my PS3 for power efficiency reasons (PPD/Watt can't compete with GPU), but my production should increase to > 7000ppd.
Good to hear you got an 8800GS. Mine produces 4500 ppd. It would be awsome if a few more members of the team would pickup one of these cards. For the price you cant lose.