I wish Apple would, but they aren't going to.....
There was a rumor going around when they were working on it originally that they were going to port it to x86, but it turned out to be just that, a rumor.
It's unfortunate...but I can understand why Apple won't port it. As it is, Apple has pretty much complete control over what hardware works in their computers which eliminates a LOT of the compatibility issues that people in the PC world normally have.
Keeping OSX on Apple hardware pretty much keeps the money going directly to Apple, and keeps the Apple users away from a lot of the headaches PC users have to deal with sometimes when video card x won't work with motherboard y.