$199 Mac: Dell Mini 9. Great hardware compatibility.

Won't be too fast, but I love MacOS on my Acer netbook. Everything works. (although it took a bit of doing)

I feel like the comic book guy. Don't flame me, but I think it's cool to think about. Mr. Jobs would/must be steaming right now if he knew people were turning $199 Dells into fully functional Macs.

Muahahaha. Death to pretentiousness and a great OS for all. Just pay for it. At least once.