Windows 2008 Hyper-V R2 Beta 1– Download

The for free available virtualization server from Microsoft will have several new enterprise and high availability features like clustered shared volumes (CSV), failover clustering which makes it very easy to create HA VMs

Try it @

My personal opinion about the current MS virtualization is very good and the first performance results from benchmarks are looking really good. MS is currently doing a great job in the virtualization section ;-)