Through some random Web browsing, I found a very cool Google property: Keyhole. You know those fly-through maps they show on the local weather? This software can do that kind of thing…on your desktop. It uses a software client installed on your computer as the front-end and streams the data from the Keyhole servers. The service costs $29.95 per year, but there is a free trial. You gotta see this thing to believe it!