Yesterday Microsoft announced the release of "Windows Server 2008 Hyper-V", the new virtualization technology of Microsoft.
The main reasons for choosing for virtualization are scalability, cost and performance benefits. Guess, we all had to deal with VMware environment, which are not supported. The future of virtualization will change with this released software and I think we will quickly see Microsoft Dynamics CRM production environments based on Hyper-V technology.
More information about Hyper-V at: http://www.microsoft.com/windowsserver2008/en/us/virtualization-consolidation.aspx
You can read press release at: http://www.microsoft.com/presspass/features/2008/jun08/06-26hyperv.mspx