SQL Server 2005 SP2 has been released to the web. There are some signifcant virtualization use rights as well. See the press release below for more details:

http://www.microsoft.com/presspass/press/2007/feb07/02-19SQLSP2PR.mspx

To download:

http://www.microsoft.com/technet/prodtechnol/sql/2005/downloads/servicepacks/sp2.mspx