Recently, the http://blogs.msdn.com/clustering team released several White Papers about High Availability and Clustering in Windows Server 2008:
§ http://download.microsoft.com/download/3/B/5/3B51A025-7522-4686-AA16-8AE2E536034D/Microsoft%20High%20Availability%20Strategy%20White%20Paper.doc
§ http://download.microsoft.com/download/3/B/5/3B51A025-7522-4686-AA16-8AE2E536034D/Overview%20of%20Failover%20Clustering%20with%20Windows%20Server%202008.doc
§ http://download.microsoft.com/download/3/B/5/3B51A025-7522-4686-AA16-8AE2E536034D/Quick%20Migration%20with%20Hyper-V.doc
§ http://download.microsoft.com/download/3/B/5/3B51A025-7522-4686-AA16-8AE2E536034D/Windows%20Server%202008%20Failover%20Clustering%20Architecture%20Overview.doc
§ http://download.microsoft.com/download/3/B/5/3B51A025-7522-4686-AA16-8AE2E536034D/WS2008%20Failover%20Clustering%20Datasheet.doc
§ http://download.microsoft.com/download/3/B/5/3B51A025-7522-4686-AA16-8AE2E536034D/WS2008%20Multi%20Site%20Clustering.doc
§ http://www.microsoft.com/windowsserver2008/en/us/high-availability.aspx
For those seeking for that extra information, this is a great resource.
-- http://blogs.technet.com/filecab/pages/malu-s-bio.aspx