Wait wait wait... what?
Linux DOESN'T run on any PC? Hackintoshes are FAKE? All these things don't actually exist?
[/sarcasm]
Dell a while back (perhaps they still do, I'm not sure) offered Ubuntu Linux as an option instead of Windows on a few desktops, and I'm pretty sure it didn't really get anywhere.
They still do, but Linux doesn't really count if you want to run software like the Adobe suite, iTunes, MS Office, etc. I have Fedora, Ubuntu and Red Hat installed on my computer and quite frankly I don't get it. There's nothing on Linux that I can't also do on OS X.
Hackintoshes are a whole other can of worms.