Joystiq is running a story about Codeweavers' CrossOver Linux that'll let you run Windows games on your Linux box for the low cost of $40... It seems like this is too good to be true honestly... I'm wondering how well this works and how good of a box you need to have to get it to work well... I guess it would be a sort of solution if you absolutely needed to get away from windows, but are any of us game players running away from big bad bill that badly?
Although... If this would would work on a Playstation 3 running linux... PC games on your PS3? Anyone thinking of giving this software a shot (on a PS3 or not a PS3)?
Actually Cedega is the one that most use for Linux gaming, but Transgaming (the developers) are considered a bit of a black sheep in the Linux community. That said, the free WINE (on which Crossover and Cedega are based) is catching up quickly and plays a lot of games with a surprising degree of accuracy.
As far as the PS3 is concerned - unfortunately I think that's a no-no. Cedega, WINE and Crossover all rely on the presence of an Intel-compatible processor, which the Cell processor is not. I must admit I have no experience with the PS3 and don't know if it simply tries to emulate a Pentium, but I wouldn't count on it.
Don't pay money for the emulator, grab a free one such as QEMU (http://www.qemu.com/) or Bochs (http://bochs.sourceforge.net/). If you have Yellow Dog Linux or Fedora Core 5 running on your PS3, you can use one on these programs to emulate a x86 processor, which will let you run Windows, or OSX, or anything else that will work with x86 architecture. You can also just grab other console emulators to use with your Linux distro, without the x86 emulation. The NES has been successfully emulated already (http://www.youtube.com/watch?v=GIWwcGCI_nY) and many others are being tested right now.
QEMU and Bochs are both extremely slow (no wonder, as they emulate everything from processor up in software, whereas WINE, Cedega and Crossover only emulate the Windows API, making use of the native processor and video drivers) are not suited to games.