DATA: I finally got around to downloading Boinc (which stands for Berkeley Open Infrastructure for Network Computing). Basically, Boinc is by the same folks that brought you Seti@home. Only, instead of distributing software that is designed for just one "problem" (like, say, finding aliens) these folks are now moving to the Boinc platform that allows users to donate their extra cycles to any number of computationally intensive problems.
Oh, and they gave Seti@home a face lift while they were at it. (Actually, it appears that you can install a number of visualizations; of which this is just one.)
Oh, and if you didn't know already, eventually Boinc will be required to continue working on the Seti@home project. So you may as well download it now. (On a sad side-note, I no longer have access to the Seti@home account I created back in 2000, so I had to kiss goodbye those 1,500 workunits).
Currently I'm donating my extra cycles to Seti@home and Climateprediction.net. As soon as I find a good program for protein folding using the Boinc platform, I'll probably sign on for that too.