In case you were wondering, Longhorn & Vista will only support SQL Server 2005 Service Pack 2. This should be out as a Community Technology Preview (CTP) build sometime soon (I'll blog about the forthcoming changes once we have publicly announced the CTP details). A more detailed explanation on SQL Support for Longhorn & Vista is posted here: http://www.microsoft.com/sql/howtobuy/sqlonvista.mspx