Hi Bob,
That was filmed with the GO Pro HD. I believe the powers that be frown on the use of the suction cup.
Now I would never do it this way, but I know a friend that uses the suction cup mount on an airplane.
He tested it a bunch on the windshield with it backed up by some high quality climbing rope that was in arms length. So if it broke loose he would be able to grab it from his window.
After many hours of testing with out any failures, he tried it on some spots further out on the wing, still tied off so that it could be grabbed and reeled in at flight or after landing. Currently he has used it for well over 10hrs without any failures. However he still is not quite 100% sure it will hold in all situations. Therefore he will never be setting it up without some type of backup.
It was then suggested that it be covered in foam, so that if it did cut loose it wouldn't beat up the plane. This mod is in progress, and should work well. It was set up so that the camera if loose on the end of the rope would not interfere with any flight controls nor beat up the plane, and just fly in the slipstream. It would have to be designed for each aircraft and in each filming location.
At least that's what he does.......
Have fun out there!