XSKN, the same case and skin shop that prematurely released info on iPhone 3G and iPod Nano accessories, currently (at the time of this posting) has a listing on their homepage for an iPhone Nano case. Clicking it results in a busy server error, but I grabbed a shot from the homepage. So, just in case the whole site goes down, you can see that the product is there. And it's causing a lot of frantic clicking; just as XSKN planned, I suspect. Woops!
Via MacRumors