How to migrate (not upgrade) from Windows Server 2003 Server Clustering to Windows Server 2008 Failover Clustering
The 2008 articles are just starting to hit the web. This one deals with migration, not upgrading. You can’t upgrade to 2008 Failover Clustering. I am actually glad you can’t upgrade, I really don’t like that word. Here is the article: http://technet2.microsoft.com/windowsserver2008/en/library/6820ae3f-1ecc-43fd-8a76-fe8c2125cfe61033.mspx?mfr=true