Just in case you missed it!!! Microsoft Support announced an update to the SQL Server virtualisation support policy.
Guest Failover Clustering is supported for SQL Server 2005 and SQL Server 2008 in a virtual machine for Windows Server 2008 with Hyper-V, Microsoft Hyper-V Server 2008, and SVVP certified configurations provided both of the following requirements are met:
Guest Failover Clustering is when you create a SQL Server failover cluster inside a virtual machine where the nodes are running as a virtual machine. A non-SVVP configuration that meets these requirements will receive support from Microsoft CSS per the policies documented in
897615 (http://support.microsoft.com/kb/897615/ ) Support policy for Microsoft software running in non-Microsoft hardware virtualization software
It is important to read through some of these details:
For more information: http://blogs.msdn.com/psssql/archive/2009/05/19/sql-server-support-policy-for-failover-clustering-and-virtualization-gets-an-update.aspx