I just received my Treadz case from iFrogz (they also make a more mainstream case, check the site). The Treadz case is black (On a black 8GB) and has a cool tire tread impression and really fit well. It is thick and seems as it will protect well , and the click wheel and screen are recessed a good bit (no screen or click protection over them, but I like it this way). Even though the headphone jack looks small my Shure plug goes in fine. Also dock cable good, but it doesn't fit in the docking cut-out for the nano. The one negative would be that if you use the hold switch, and you thought it was hard to hit before, this case will not make it any better. It is down in there and harder to use than before.

Overall for the price and early intro I would say 9/10. Sorry no pics, but the website has good ones...K