Don't know how it will work on all sorts of hardware but this looks like a fun thing to try.
From The Register:
Run Mac OS X on a PCYou need to obtain a hacked version of OS/X called Kalyway 10.5.2 ISO and the ability to install sucessfully severely depends on your choice of hardware but it can be done. With 'killer apps' like Final Cut Studio, Aperture and Logic Studio out there for sale for a few hundred bucks each, it makes sense to avoid the high built-in costs of buying the hardware and to run things on a cheap Intel clone.
We show you how
Special Report Want to run Mac OS X on a PC? Perhaps you don't want to pay the premium for Apple's hardware - or Apple doesn't make the kind of computer you need, such as a netbook. Because of its native roots in Motorola and PowerPC code, this has traditionally required instruction level emulation. Two things have changed. Apple based Mac OS X on NeXT code, which could run on Intel. And since 2006 Apple has been making Intel PCs. In theory, installing Mac OS X on a PC is much easier. How do you go about it?
The version of Leopard sold by Apple includes drivers for Apple provided hardware only. It also requires an Apple Extensible Firmware Interface (EFI), which replaces the traditional PC BIOS. The Kalyway DVD is a hacked version of OS X that removes the EFI requirement and includes a variety of device drivers for common PC hardware.
Should you try this? As a minimum, I'd recommend the following: You are comfortable editing BIOS settings and knowing the details of your hardware and chipsets. You're not afraid of the Unix command line (not a definite requirement, but many of the troubleshooting guides out there mention it, so you'll probably have to use it at some point). And probably the most important: You have a lot of time.
