After playing this game a bit more, I'm proud to admit that it has toppled Mario Galaxy as my new favorite Wii game.
There is just so much to explore down in the ocean they've created in the game, and I find myself amazed at how quickly the time seems to pass. I found some undersea ruins, and it was almost 3 hours before I realized how long I had actually been playing.
This game comes with my highest reccomendation. It's different from what most consider a traditional game, but I think that just about anyone will be pleasantly surprised once they give it a chance.
Finally got a chance to go diving with a friend. I was surprised that it worked as well as it did. The two of us explored some dark caves and found all sorts of neat fossils. As with many Nintendo Online games, communication was a problem, but in this game's case, it adds to the effect, since you really wouldn't be able to communicate beyond hand signals to another diver below the surface.
Also, I put together a series of music from my own collections. There's some Shadow of the Colossus, ICO, and Uru: Ages Beyond MYST, in there.
Also, Zen Davis, as much as I didn't think that you're "soundtrack" would fit my sensibilities, I have so say that it strangly works in a way.