I just got my Otter Box commuter case and wanted to share some pictures. Before I ordered it I had a hard time finding pictures showing the added thickness.
With the Otter Box on, at its thickest point (hump at the top), it's about the same thickness as the Droid 1. Sorry for the crappy pictures, I took them in low light.
The Droid 1 is the rear when they are in line with the camera.
Also if you're interested, I wanted to see how well my old Droid 1 held up to some keys and a knife. Here's the video: .