Being that the PS3 carries a Cell Processor there are many exiting things that you can do with it. Check out this link to learn how to make your PS3 a supercomputer that runs Linux:
Also check out this other youtube video about the supercomputer made out of 1100 G5s:
Is it possible to link PS3s in the same way to make an even more powerful Ps3 supercomputer? That will be a very interesting project. What do you guys think?