Flatirons is doing some VERY cool work with the FAA. One result of this work is a tool called VISAGE, a geospatial visualization and analysis tool that processes data into files that are loaded into Google Earth. These faces of VISAGE provide aeronautical viewing for the FAA legacy En Route system adaptation (ACES) and the modernization effort (ERAM).
You can check out the solution brief here:
http://www.flatironssolutions.com/downloads/VISAGE_Datasheet.pdf
If you are interested in seeing a demo, check out one of the following links:
http://www.flatironssolutions.com/VISAGE/Demos/VISAGE_ACES_Demo_lores.rm
http://www.flatironssolutions.com/VISAGE/Demos/VISAGE_ERAM_Demo_lores.rm
