The authors of System Center Operations Manager 2012 Unleashed book are offering free for download a dashboard for Virtual Machine Manager. The management pack offers dashboards as:

• VMM Guest Health
• VMM Guest Resources
• VMM Host Performance
• VMM Hosts and Guests
• VMM Performance
• VMM Server Service Level Objective
• VMM Summary Dashboard

Screenshots from the MP can bee found here and the MP itself can be downloaded from here.