Go and take a look at the download page for Windows Server 2008 RC1. It contains a link to a version with Hyper-V Beta. The Windows Server Division weblog has more details about the release.
Some critical new features in this release are:
- Support for quick migration and cluster HA (16 nodes).
- Installation from Server Manager.
- Support for running on Server Core!
- VSS support.
- 64 GB of memory for a VM (just like in ESX 3.5).
Integration components are available for Windows Server 2003 and Windows Server 2008 (x86 and x64). Integration components for Linux are available in beta form.
Quite a surprising release. Everybody was expecting this only at the release of Windows Server 2008 in February.



