Wirelessly posted (iPhone 3G: Mozilla/5.0 (iPhone; U; CPU iPhone OS 3_1_2 like Mac OS X; en-us) AppleWebKit/528.18 (KHTML, like Gecko) Version/4.0 Mobile/7D11 Safari/528.16)
Thanks for posting tfar, this looks like an excellent case. I'm on my 6th Griffin Wave case (a few cracked and the rest wore down or discolored with use) and I've been looking for a case that's a bit lighter and slimmer but still offers some protection to the screen edges.
It's worth noting though that scratches on the back of the iPhone come not necessarily from putting the case on, but rather from tiny pieces of dirt and grit getting trapped between the case and the phone. I'm not sure if the lined case suggested above completely eliminates the scratches, but they are inevitable with any kind of hard plastic case, particularly on the white model.