InnoPocket (http://www.innopocket.com) has launched the US$29.99 Amphibian Case for the iPhone 4, a waterproof, play-through case with an with an inner shell that can be used as an everyday polycarbonate hard case.
This molded polycarbonate inner shell is rigid and crush proof making the case durable and strong, according to the folks at InnoPocket. The silicon jacket and its bump out corners will further protect your iPhone 4 from accidental drops.
The play-through design allows for full control of the touch screen functions. The utout at the back for the camera will let you to take underwater pictures and videos with your iPhone 4.