I bought a Fujifilm F80EXR and underwater housing from B+H to see what the 720p24 was like. Turns out it's not that good, but it sure was fun shooting below the surface. Here's the piece (http://www.youtube.com/user/TheMysteryTravelShow?feature=mhum#p/a/u/1/QLgdLvk4ov4). Let me know your thoughts, although it's nothing fancy.

You might want to tighten it up a lot: cut out the footage in which nothing's happening. Otherwise we're staring at a lot of algae and a few bubbles. Or give the camera some movement. Not easy to do without stirring up silt.

What would be really cool is getting a bass or trout to strike a lure. I think that's probably the hardest shot to get under any condition.