Waterproof Cell Phones?

Yesterday blog post about waterproof laptops got me thinking about other mobile devices, cell phones in particular. Although there are no mobile phone handsets on the market at this time that are designed to survive and/or operate while immersed in water, accessory manufacturers have designed supposedly waterproof cases for a large number of phones and I have heard that some cell phone manufacturers are working on developing truly waterproof handsets.

Interestingly enough, many cell phone models can survive a dunking (not that I'm suggesting anyone try testing this). However, from personal experience and many reports, the problems that occur if a cell phone is dunked are mostly battery related. I've read of a number of cases where replacing the battery will restore the phone to operation - after waiting at least a couple of days to be sure that the phone has completely dried out.