I have seen a number of questions on this in the past so I am happy to announce that we just released the Windows Server 2008 Failover Cluster MP. You can now download it on:

http://www.microsoft.com/downloads/details.aspx?FamilyId=AC7F42F5-33E9-453D-A923-171C8E1E8E55&displaylang=en&displaylang=en

Big thanks to those who helped validate the MP.