Tore Lervik has create a very cool Hyper-V Monitor Gadget for Windows Sidebar.
The gadget can list multiple servers at once and also support vmconnect when double clicking on a VM.
PS: The gadget uses WMI to connect to the server so the user need remote WMI access (Step 5) on the Hyper-V server
I’ve installed it and it’s really cool!
One feature request though 😉 Resizable Gadget so I can read the whole names of the guests.