This looks like fun

What is it? According to CNET News, it's a boat designed to move like a dolphin. Innespace Productions, the manufacturer, describes the craft as the only submersible that does not take in water to keep itself below the surface. They claim the experience of riding in the boat is akin to "underwater flight" and that the unique design allows for incredibly dynamic motion. Whatever it does, the FAQ has more details, and it sure sounds cool, even if you can't buy one.