Cathy have you tried Boot Camp?
When you say "limited version of Windows has been available for years" I assume you're referring to Virtual PC - which is so slow I don't have the patience to use it, so for me it's been "virutally" useless and never been a viable option. Boot Camp is supposed to blow Virtual PC out of the water and it's brand new. You have a true dual boot instead of a Windows emulation.
I still maintain that until Boot Camp came around a couple months ago, PCs were better for business because so much business software is only available for the PC - examples are the library circulation software my mother uses, the membership management software that my local workout center uses, our website statistics software - all are worth several thousand dollars and only work on the PC. Many games the kids play only run on the PC, too. With Boot Camp, this becomes less of a problem, although it's still in the testing phase and I've read they have some bugs to work out before it's perfect. And you have to boot into either Windows or OS X, you can't run Mac-only software at the same time as Windows-only software, and have to reboot to switch from one to the other.
Anyway, I can't wait to try it.