Virtual PC 7 is available now for download and inclusion with your copy of Win 7 RC.
It’s working like a champ. I’ve got it running on my Lenovo T61p laptop, and a virtual Win 7 machine running. In the virtual Win 7 machine, I can run my “legacy” copies of Microsoft Office so that I can be ready to test new copies whenever and wherever they come from. ;-)
Virtual PC 7 now supports USB connections, so peripherals will work within the virtual machine. The only downside is that Virtual PC 7 still doesn’t support x64 virtual machines, so I can’t install Windows Server 2008 and have support for x64-based versions of SharePoint Server.