NASA World Wind

Heard about this in #102 of the .NET Rocks! Show. Quite an interesting show. However this site is even cooler, insane even. In short it is an open source project that lets one zoom from satellite altitude into any place on Earth. How is it different from Keyhole? It seems that you can input data from a myriad input data sources. This includes satellites feeds, weather feeds, infra red feeds etc. The coding is in C# and managed Direct X. The best part is that it is completely in the Open Source space. The only minus point, the size is slightly forbidding. The program itself is quite small but the datasources are large. Anyways do hop over!!!