The actual home page is:
http://www.ud.com
its more like seti than rc5. i ran it for a while before switching to RC5. Currently there are no agents for
Linux or the Mac. So its a windows only deal right now.
they offer some cash and prize incentives as well.
Its a worthy project though. Here's a quote fron their page:
"It just allows your computer to screen molecules that may be developed into drugs to fight cancer. Each individual computer analyzes a few molecules and then sends the results back over the Internet for further research. The goal is to enlist enough volunteers to contribute 24 million hours of computational time. This project is anticipated to be the largest computational chemistry project ever undertaken and represents a genuine hope to find a better way to fight cancer."