Gadgets and Sidebar
Widgets, Gadgets...whatever you call them, practically every OS now ships with a framework for tiny, low-impact desktop applets. Vista's are called Gadgets and come from the Windows Sidebar. Gadgets are easy to create, but they're not quite as simple as Leopard's Web clippings. Still, you can use IE 7 to subscribe to RSS feeds, which will then appear in the Feed Headlines gadget.