Yep I was walking out to my car yesterday and I was carrying some other stuff with my iPhone on top and it slid off, about a 3-4 foot drop on to hard, rough, concrete.. It hit pretty hard and then slid a bit and I thought it was done for (I didn't have a case or anything on it, still waiting for my bumper to come). I picked it up to look at the damage and was amazed.. the thing only had one little place where it took the impact, and a few scratches on the back from sliding across the rough concrete, I thought it would of shattered or had way more scratches. I'm still pretty pissed at myself for dropping it but amazed at how durable it is. I'll try to get some pictures up in a bit.
Edit: Oh yeah and I've tested everything out with the camera, sound, vibrate, microphone, camera flash and everything still works perfectly.
Edit: pictures
http://img171.imageshack.us/i/img1677a.jpg/ - shows some nicks/scratches on the back
http://img824.imageshack.us/i/img1678d.jpg/ - point of impact
http://img534.imageshack.us/i/img1679kv.jpg/ - screen is still perfect
http://img694.imageshack.us/i/img1680k.jpg/ - scratches on back/a few rough edges
Edit: Oh yeah and I've tested everything out with the camera, sound, vibrate, microphone, camera flash and everything still works perfectly.
Edit: pictures
http://img171.imageshack.us/i/img1677a.jpg/ - shows some nicks/scratches on the back
http://img824.imageshack.us/i/img1678d.jpg/ - point of impact
http://img534.imageshack.us/i/img1679kv.jpg/ - screen is still perfect
http://img694.imageshack.us/i/img1680k.jpg/ - scratches on back/a few rough edges