Washable PDA

The title above links to a business brief in The Boston Globe about a washable PDA being developed with doctors in mind. If you are like me, you may have dropped a PDA, or other items in your pocket into toilets or other watery graves. What else would you like to see made waterproof? Or, alternatively, what improvements would you make to librarian clothing to prevent these tragedies?! Can you say, cargo pants? Or mitten strings for everything?