Changes in SQL Server 2008 Clustering
November 7, 2008[From MSDN Blogs]
First and most important thing to remember when working on designing a SQL Server cluster is it is entirely dependent upon the underlying base architecture that you choose to implement for the operating system. Here, it really pays to do your homework as the newer versions of Windows Server have some AMAZING features that will change the way we have traditionally thought about clustering.
The article continues at http://blogs.msdn.com/stevecarroll/archive/2008/11/07/changes-in-sql-server-2008-clustering.aspx