"The Easy Button" for software evaluation - VHD Test Drive

On November 6, 2006, we announced the VHD Test Drive Program.  There are VHDs of Windows Server 2003 R2, SQL Server, Exchange Server 2007 + LCS, and ISA Server. BizTalk Server VHDs and others will also be available shortly after.

http://www.microsoft.com/technet/try/vhd/default.mspx