http://folding.stanford.edu/
The Atari Community team number is: 38777, enter it when going through the configuration, I will post the stats page once someone has completed a project, i'm almost done with the first.

Taken from the main page:

"What does Folding@Home do? Folding@Home is a distributed computing project which studies protein folding, misfolding, aggregation, and related diseases. We use novel computational methods and large scale distributed computing, to simulate timescales thousands to millions of times longer than previously achieved. This has allowed us to simulate folding for the first time, and to now direct our approach to examine folding related disease.

How can you help? You can help our project by downloading and running our client software. Our algorithms are designed such that for every computer that joins the project, we get a commensurate increase in simulation speed."

The program can be run on Windows, Linux and MacOS X, whlie running on windows the priority of the program is always set to LOW which means it will only use extra processing power and if you want to play a game or something it'll give up the processing power to the game.

Update:

Here is our team stats page
http://vspx27.stanford.edu/cgi-bin/m...&teamnum=38777