One of my digital cameras is an Olympus Stylus 720 SW.  It doesn’t take the prettiest pictures in the world, but its strength is its versatility.  The camera is waterproof to 10 feet, and shockproof if you drop it from less than 5 feet.  I can take it to the field or bother my fish right in the tank.  The movies are pretty shaky, but I’m trying to get the hang of it.