In the past we talking about how to protect our iPod from water, now the trend has been changed. As iPhone make an iPod obsolete, now most player taking more focus on iPhone. Lets mention OtterBox who is developing waterproof cases for iPhone now. The cases is still not ready for prime time, but it could be available soon.
The OtterBox cases built upon three protection layers including special membrane that protect the screen but still allows users to access the multitouch screen as usual. It is reported that all the button is protected yet useable but the the dock connector, silent/ring switch, and headphone ports remain usable through the plugs employment.