VirtualPC already has a virtualization core for x86, due to the Windows version existing. Connectix had version 5.2 of the Windows version out around the time they had VPC 6 out on the Mac side, and before Microsoft bought the company. Being that Microsoft has the engineers that know the Mac side of things already, they could probably get a VirtualPC release out for the Intel Macs ahead of VMWare if they wanted to.