Virtual PC 2007 Release Candidate

Is There. the features in it are:

Hardware-assisted virtualization*
Virtual PC 2007 includes support for virtualization technology from Intel and AMD. By default, hardware-assisted virtualization is enabled if the feature is enabled on the physical computer. You can turn this assistance on or off for each virtual machine by modifying the virtual machine settings.

Built-in support for network installations
It is possible to install an operating system on a virtual machine through the network. The virtual machine network adapter includes support for PXE boot. This means that when the appropriate network infrastructure is in place, you can perform a network installation of a guest operating system without needing a PXE boot floppy disk.

Support for Windows Vista as a host operating system**
This beta release of Virtual PC 2007 introduces support for Windows Vista as a host operating system. The following versions of Windows Vista are supported: Windows Vista Business, Windows Vista Enterprise, Windows Vista Ultimate.

Support for Windows Vista as a guest operating system
This beta release of Virtual PC 2007 introduces support for Windows Vista as a guest operating system. The following versions of Windows Vista are supported: Windows Vista Business, Windows Vista Enterprise, Windows Vista Ultimate.

Support for 64-bit host operating system
This beta release of Virtual PC 2007 supports 64-bit host operating systems. However, there is no support for 64-bit guest operating systems.

part of this is not new (to VPC 2007) but it looks interesting to me at the moment.