Recently, Pentax has announced their latest Waterproof camera added to their rugged line of camera. They called it Pentax Optio W80 camera, which I consider an excellent piece of super sensitive underwater camera.
Pentax Optio W80 has a good 12.1 MP sensor, waterproof up to 16 feet depths, shockproof up to 3 feet, dustproof and heatproof up to 104 Fahrenheit. When you flip to the rear side, you will see a 2.5-inch LCD screen for navigation (not touchscreen).
Pentax Optio W80 has 5x optical zoom lens, shake reduction feature, 32 faces detection technology, 30 fps for 720p movie recording mode, and has internal memory of 33MB built-in memory. It is now available for pre-order (in Store this July) for $299.95. If you are interested, you can head to Amazon to grab one.