Linux on PS3
Linux on PS3 PlayStation 3 Linux PS3 Linux
"It was fully intended that you, a PS3 owner, could play games, watch movies, view photos, listen to music, and run a full-featured Linux operating system that transforms your PS3 into a home computer." – Your PS3 manual says that.
All PlayStation 3 models, except PS3 slim are capable of running linux. Any linux based operating system can access 6 cores of your PS3 processor, totally it has 7, but the last one (RSX or Reality Synthesizer) isn't available, because Sony didn't wanted to give you full control over all things. But that shouldn't stop you from experiencing the joy of making a your gaming device into a media center or a regular PC.
If your inner geek is calling you for action, than head over to linux distribution page and pick out a distribution that suits you. Feel free to try a few, because some of them even have a live CD, which means that you DON'T have to install anything, just put the CD in, boot up and see if you like what you are seeing.