Having gone into Hyper-V, you would probably have seen a greater need for High Availability since you now have multiple workloads in a physical server. Here are some great guidance paper on how to achieve that high availability requirements through clustering.
They are a must see for Virtualization High Availability;
· Design for a Failover Cluster in Which All Nodes Run Hyper-V http://go.microsoft.com/fwlink/?LinkId=129117
· Requirements and Recommendations for Failover Clusters in Which All Nodes Run Hyper-V http://go.microsoft.com/fwlink/?LinkId=129110
· Checklist: Failover Cluster in Which the Servers Run Hyper-V http://go.microsoft.com/fwlink/?LinkId=129123
/Dennis
