KeyholeSystem - Raymond Yee's Wiki

Keyhole 2 LT is a software application that you download and install. It’s only 9MB, but with an annual Keyhole subscription, you can fly through 12+ Terabytes of Earth imagery and data – spinning, rotating, tilting, and zooming. Think magic carpet ride.

Maybe the pro version would be useful at work.

Keyhole Community Entrance

Some of the map data is drawn from AirPhotoUSA.

Slashdot | Google Acquires Keyhole Corp.