What I don't understand is why people seem to think that Windows-booting on Intel Macs seems to be so necessary. In my opinion, if you're going to buy a Mac, buy it for its merits now, not for what could possibly happen with Windows-booting. Even if there was Windows-booting, why in the world would you buy a Mac to run Windows? If anything, I think it would make more sense to buy Virtual PC or use some other emulation program, especially because now that we're on Intel chips, the cost of emulation/virtualization will be low and Windows should run fast in such an emulator/virtualizer.
But to buy a Mac and base your purchase on being able to run Windows in the future? That doesn't make sense.
To me, being able to run Windows on a Mac is kind of akin to being able to natively run Windows applications on the Mac via yellow box (or whatever that technology was supposed to be called). If it was really easy to do, and you could do it without doing any significant hacking, Windows developers would have no reason to write Mac-specific software, and would just say, "Go boot your Mac into Windows and then run our software! Why should we spend millions of dollars creating programs for you Mac users when you can run our program already?"
I don't have any problem with those savvy enough hacking Macs to dual-boot Windows. But when it becomes a standard or expected feature, the Mac platform will suffer. So I think, in a way, it's good that Vista won't support native EFI booting, and I'm glad that Apple isn't officially supporting running Windows on the Mac.