Microsoft released a whole set of white papers and made them available for download off the same page here.
The documents available include:
- Microsoft High Availability Strategy White Paper.doc
- Overview of Failover Clustering with Windows Server 2008.doc
- Quick Migration with Hyper-V.doc
- Windows Server 2008 Failover Clustering Architecture Overview.doc
- WS2008 Failover Clustering Datasheet.doc
- WS2008 Multi Site Clustering.doc
They are all fantastic reads and I highly recommend downloading them.