Update: Apparently, Parallels is planning to provide Mac OS X virtualization on Macs, so that users can run additional versions of Mac OS X in a window. The side-effect to this feature would make it easier to run Mac OS X in a similar virtualization environment on non-Apple PCs. Details
Ugh...The thing will run dog slow since it will have to emulate the PPC. Remember kiddies. Tiger is the first version of OS X to run on Intel. If you want to run 10.2-10.3 you are going to have to emulate a PPC.