OpenMac is Pretty Ugly. Get it? both are oxymorons

Psystar Corporation - OpenMac

The highly extensible OpenMac is a configuration of PC hardware capable of running unmodified OS X Leopard kernels. If you purchase Leopard with your OpenMac we will not only include the actual Leopard retail package with genuine installation disc, but we also include a Psystar restore disc for your OpenMac and we will preinstall Leopard for free so you can begin to use your computer right out of the box.

According to the FAQ they are capable of using a regular OSX Kernel through EFI emulation (new BIOS standard)

The premise of running OS X on an OpenMac hinges around the emulation of the EFI BIOS that Apple computers use.

Let’s see how long this lasts. I give it less than a week if it hits the Digg/Techmeme circuit.