I didn't think that the OS X license let you run it anywhere other than Apple hardware. That's just something I've heard though, never actually investigated it.

I doubt this is true. I know that historically, Apple users were limited to Apple hardware by the nature of the architecture. However, Apple switched to using the same hardware as the rest of the PC world.

Another option would be to make a Hackintosh, actually; if you have a sufficiently powerful spare machine; this would also need the OS software, so virtualizing is probably just as easy.