IIS 7 and Windows Failover clustering support!!
In Windows 2000 clustering, there was a resource for IIS clustering. This was removed and hasn't been available until recently Thomas Deml from the IIS team pointed to a KB article.. Exciting, Exciting news!!
http://blogs.iis.net/thomad/archive/2009/10/27/iis7-and-failover-clustering.aspx
Here is more information about Windows 2008 failover clustering
http://www.microsoft.com/windowsserver2008/en/us/high-availability.aspx
Clustering forum
http://social.technet.microsoft.com/Forums/en/winserverClustering/threads
Enjoy,
Steve Schofield