Not only do they not sell OS X for Intel yet (and they won't until 2007 when 10.5 comes out), but if they did, you wouldn't be able to install it on anything but a Mac, this is because they have a piece of hardware the installer looks for to verify that it is indeed a Mac.
And no, companies have not being doing it for years, OS X for Intel only came out a year ago. VMware doesn't have a PPC emulator. Maybe PearPC, but like I said, thats extremely slow and crappy.
Don't kid yourself.