Hardmac.com has videos and more- OS X on a PC…The Apple Developer kit version of MacOSX x86 has indeed been fully cracked! An anonymous source has sent us a video showing MacOSX x86 booting natively on a Pc notebook Mitac 8050D (Pentium-M 735/1.6GHz). As you can see the boot phase is rather fast, and the error message at the end is simply due to an authorization error on the kext allowing PS/2 support. [via] Link.
HOW TO – Mac OS X Running on Non-Apple Hardware