Xbox Friends Watch - a Sidebar Gadget using Silverlight
Adam Kinney, a developer here at Microsoft, has authored a Vista Gadget thet allows you to keep tabs of some of your Xbox Live friends list. If you have Vista and you have Silverlight installed, this gadget will help you keep track some of your friends. Note: This gadget won’t actually read your friends list, you have to manually enter the friends you want to track into this gadget.