I'm also looking at this from another, more personal angle. The sad truth is, I need WinXP for much of my work. I don't want to be busting anyone's balls here, but a lot of embedded systems development software is Windows-only. And a lot of people need to ship a Windows version before anything else. So, not that I like Windows development much, but, more often than not, I get hired to do some Windows drivers, and an MFC application or two to go along. I get quite a few of these jobs - where the overall coolness of the project (and the money:-) more than offsets the need to use Windows.
Now, I like Apple hardware a lot, and the only thing that stopped me from buying an Apple laptop so far was that it wouldn't run goddamn Windows, so I'd need to own another, PC-compatible, machine as well. And I just don't have time for that many computers:-)
But, it'd be extremely cool if I could, so to speak, have an Apple, and eat it too. In other words, triple-boot an Apple machine. Then I could use it for any work that I do, and the coding I do for fun too - which would even cooler. Anyone know what it'd take to run WinXP on one of these new ont-yet-existent things?