> To paraphrase a Jobs joke,...
Yes, I'll have "Ultimate OS-X", please...
XP Pro and Vista Ultimate are not priced much higher that your $129. I just bought a copy of XP Pro from Newegg for $139.
How is this possible?
Well, for one thing, you can't run Mac OS without a Mac, so Apple knows the software is going to a Mac.
To get a price break on Windows, you buy an OEM version, which is licensed to a specific motherboard. If you upgrade the motherboard, you have to make a phone call to MS.
If you pay the retail price for Windows you get a license that allows you to move the OS from one computer to another indefinitely.