Those of you with Google Earth may be interested in using the "fly to" function to fly to "weissach germany" sometime.
When you get there, to find the Porsche facility look around for the distinctive large circle that is the skid pad and the test track. Tilt things a few degrees and use the pan arrow button and you can look all around at the test track, racing department, casino, etc.
The view is very detailed, unlike much of the German countryside. I bet someone at Google has an interest in the area....