Okay so you really need to see the video to understand this, but a company in San Francisco have created a completely waterproof coating, that can be applied to any device, without any electrical interference. It is very thin and clear also. The drawback I see is that you have to send your device to them to get it applied. But I would imagine it will start appearing on phones/ipods etc in the near future as standard. Anyway check it out with your own eyes…
http://gcaptain.com/maritime/blog/gcaptain-exclusive-shellbacked-ipod-touch-video/