apparently, now many non-gamer (researchers) love PS3 Cell processor.
They make PS3GRID,a similar project to Folding@Home.
PS3GRID is a volunteer computing project based on the PlayStation3 and BOINC for full-atom molecular dynamics simulations and other scientific applications specially optimized for the Cell processor. Your contribution is very important because our Cell MD molecular dynamics software runs over an order of magnitude faster on the PlayStation3 opening the way to innovative computational experiments.
the bad thing is, PS3GRID need to be installed under Linux, and many PS3 owner dont install linux