Dropping your phone into a toilet or sink is a guaranteed killer, unless you have it stashed in some kind of waterproof case. Now there's one that won't ruin your phone's sleek profile.
The Case Marine for iPhone 4 and Galaxy S2 from Gooma is a soft polyurethane skin that you stretch over the phone kind of like a condom, and at just 0.25mm thick it's almost as thin. In fact it's so thin, that you can still put your Case Marine clad phone inside an additional case of your choice with no fit problems. Talk about being super safe.
The Case Marine gets a JIS rating of IPX8, which means that it's certified as waterproof down to 10 meters, or nearly 33 feet. Perfect if you want to send out Tweets while snorkeling.
What you don't see in the video is how you get access to the dock connector or headphone jack, but I expect you need to peel back the cover from those areas to use them. Sounds like a good time to get an inductive phone charger.
The Gooma Case Marine case is currently available for the iPhone 4 and Samsung Galaxy S2, with an iPad version coming soon. Prices range from $15 to $50.