OK this is a spin off of taffys thread but haven wanted a new topic so heyt this is it, its mostly about games, i only know a certain amount of games wich play on ther programs such as Warcraft 3 plays on Macs, but thats it, anymore input....
I think you can get most games to run on Linux if you mess around a bit with how they're installed. I remember seeing somewhere a version of Linux that was actually meant for playing games on.
I think that there's also different versions of some software that you can buy to run on Linux or Mac PCs.
If you do go the linux route then make sure you have an NVIDIA and not an ATI graphics card. Cedega is virtually useless running anything under ATI unfortunately *sulks*.