Hyper-V on the side
I noticed today that someone has written a new cool gadget for the Windows Sidebar that lets you display what multiple Hyper-V servers are doing, all from your workstation. Double clicking on a server will also allow you to connect straight to it.
You can get the gadget, and more info about it, here: mindre.net/post/Hyper-V-Monitor-Gadget-for-Windows-Sidebar.aspx