Just read a few articles about a project done by Stanford University connected with their "Folding@Home" project. Folding@Home basically allows bits of data to be sent to people's computers (who are willing to install their software) to use their computer's processing power for research during the times that you aren't actually using the computer for something at home.
This project takes that idea a step further by utilizing the Sony PS3's processing abilities and its network capabilities. So, if you install the Folding@Home application on your PS3...it will analyze bits of data while you aren't playing games, but have left the PS3 on.
Folding@Home on the PS3
Folding@Home info on Wikipedia
Folding@Home for the PS3 will be available for download on March 23.