Don't tell anyone who knows me as a total Apple fanboy, but I decided I want to load Windows on my new iMac via Boot Camp just to see how it works, to learn firsthand the differences in the OS's, and to possibly take advantage of some programs not ported for the Mac.
So, I emailed my company's IT guy on Saturday, asking his advice on which flavor of Windows to run (XP, naturally) and he said he could get me a fully licensed copy through the company's account for 65 freakin' dollars! I jumped on that, of course, and - because they won't license XP anymore, but MS allows licensed users to downgrade one step - I now have in front of me a full copy of XP and of Vista, which the IT guy burned for me today.
So, I'm going to give this a shot and see how it works; this thread and others in this topic have been very helpful already.
Just passing this along: My IT guy also gave me the URL of a program he suggests I try out called "Wine" http://winehq.org/
He says it allows Mac, Linux and other OS's to run Windows programs "fairly easily." (He runs Linux at home.) I'd never heard of it, but said he's used it for years and said the list of apps it can run is around 17,000. I'm not recommending it because I have zero experience with it, but thought his description interesting enough to mention here for what it's worth.