As a big supporter of all things Apple, all of this may change when they come out with the new chips. I think compatibility will become a little easier. I would bet that would be something that Apple pushes in a big way. I know with my external hard drives, for example, if I were to format them with my PC, I can use them on both the PC and my IBook, and IMac. If I format them with Apple's OS, my PC will treat it like a slice of toast. I had to format my IPod with the PC to work on all of my computers, also. I think its part snobbery, and part windows is just happy to get their stuff not to crash. I will say that Windows XP is the best they've done yet, but it did follow ME which I think crashed if you hurt it's feelings.