We haven't heard much from Innopocket lately, but the company is back with Amphibian for iPhone 5 ($30), the direct sequel to the iPhone 4/4S version. The case breaks down into several pieces: a clear plastic shell, a second plastic piece that rests against the back, a rubbery membrane that stretches over the front of your phone and around the back, and finally, a hard plastic backplate that screws in place, holding it all together. The reason…