Thanks for posting the pictures. I did the same thing with $2 of parts from ACE Hardware. For any who are wondering about doing likewise, the main clamp is an electrical conduit clamp (not a water pipe mount). I used nylock nuts so that they wouldn't come loose with vibration, and a slice of "Foamies" foam around the handlebar tube to keep from scratching it and to cut vibration a little.
The mount is solid, although it does vibrate a bit. I'm not sure if I'd do this on a mountain bike or not. I probably would, just because having a GPS mounted on a bike is that cool.
My only real problem is that the mount covers the "lock screen" and "full screen" buttons. When I hit a good bump (pretty common on Oklahoma's roads ), it switches to fullscreen or back. Cutting a little bit of plastic would probably solve this.