Cool Check it out! ..
Source: Microsoft launches Virtual Hard Disk (VHD) Test Drive Program
The Microsoft VHD format is the common virtualization file format that provides a uniform product support system, and provides more seamless manageability, security, reliability and cost-efficiency for customers.
You can get the full list here: http://www.microsoft.com/downloads/results.aspx?pocId=&freetext=msvhds&DisplayLang=en
- Windows Server 2003 R2 VHD
- Exchange Server 2007 VHD
- ISA Server 2006 VHD
- SQL Server 2005 VHD