Believe it or not, I'm not kidding on this one
There's no denying it, even though the PlayStation 3 may be the most late, most expensive, and most, um, well ventilated of this this generation's consoles, Sony's also going out of their way to make the device appear as versatile as possible. So hell, if your machine is going to burn energy when not in use, best to put that power suck toward a good cause, right? Stanford and Sony have announced that PlayStation 3s will be able to participate in Cure@PS3, making gamers' consoles massively parallelized computing nodes for the Folding@Home project. Right up top is a taste of the eye candy that awaits those who dedicate their Cell processor to stamping out cancer with the Stanford crew.
And more details are available here