H2O Audio has introduced its new iSH2 Waterproof Headset for the second-generation iPod shuffle. The iSH2 is the first integrated waterproof headset and case for the 2nd-gen shuffle, and was developed with the assistance of world record holder and Olympic multi-medalist swimmer, Natalie Coughlin. The case works up to 10 feet underwater, is designed to be worn on any swim goggles or with the included sportband, and offers full control of the shuffle’s…