Well we may have just found the first 3G iPhone case. According to the manufacturer, this case if for the 3G iPhone, and there is also one for the normal iPhone. The case seems to be called ELECTRAonBLACK, which no doubt refers to the wild colors of the case. It could be a manufacturer looking for attention, but then again, it could be legitimate.

As you can see, the case clearly fits the rumored specifications.  The design of the case fits the curved back rumor, it also fits the description of the bottom of the device. The device in the case is very clearly a stock photo of the current iPhone. That would be expected considering the device is not even out to the public yet.

It is not clear when the case will be made available. Logic would suggest as soon as the 3G iPhone comes out, but you never know. Since the device in the photo is the original iPhone, we do not get to know anything new about the 3G iPhone.