I know for certain that at least two folks have purchased new computer hardware in order to compete better. This stuff is strangely addictive.
Anyhow, if you'd like to join the fray, we're making it easier now. DiMaestro has written up some instructions on getting started with folding, complete with info for everyone from Mac freaks to dually Athlon owners. He explains how to run the Folding client as a service in Windows, as well, so you can install it on every PC in your workplace. Err, not that we would recommend that. Especially not the getting caught part.