Comment from: Rob Visitor
Nice post Paul. MS just uploaded an additional 26 terabytes of imagery and 3D models last week, and they've been doing that nearly every month. The 3D was only released in November '06, and there are already over 100 cities comprising more than 100,000 fully rendered buildings! They will more than quadruple that capacity this year. Here are some collections in Virtual Earth that show all of the polygons in areas where you can find 3D buildings - provided your blog formats them correctly! They should open Virtual Earth with a collection of items down the left hand columns. I'm constantly updating the polygons with building counts and such, so you can also subscribed to the collection via RSS to be notified when they change.