After posting about our support for SQL Server 2008 I got some questions about Hyper-V support so here you go:
"Support will be provided for client management, site server roles, and the administrator console running within a Hyper-V environment. There are no hot fixes required for the release to support configuration scenario. This applies to customers running Windows Server 2008 with Hyper-V RTM installed."
J.C. Hornbeck | Manageability Knowledge Engineer