Hi, All!
Jose Barreto just posted an article describing different ways to implement http://blogs.technet.com/josebda/archive/2008/06/17/windows-server-2008-hyper-v-failover-clustering-options.aspx .
The scenarios described include:
   1 - Parent-based Failover Clustering with two physical servers
   
   2 - Child-based Failover Clustering with two physical servers
   
   3 - Mixed Physical/Virtual Failover Clustering
   
   4 - Failover Clustering with two child partitions on one physical server
   
   5 - Standalone demo laptop with Virtual iSCSI SAN
  
   Check the details on each one (including a "before" and "after" diagram for each) at
   
   http://blogs.technet.com/josebda/archive/2008/06/17/windows-server-2008-hyper-v-failover-clustering-options.aspx
  
-- http://blogs.technet.com/filecab/pages/malu-s-bio.aspx