Well . . . more like top 900. If you're not familiar with the Folding@Home project you should check out their website. In short, the project co-ordinates the spare computing power of many computers interconnected by the Internet to act as one single, loosely-coupled distributed super computer to help scientists understand protein misfolding-related illnesses. The headline diseases are cancer and Alzheimer's of there are many other diseases the scientists using this system research. Less interestingly, there is little evidence to support the conspiracy theory that Folding@Home participants are helping Stanford University develop biological weapons. There are also some arguments against running Folding@Home if you care to read through them.