These latest The Legend of Zelda: Skyward Sword screens show our hero Link in Lake Floria. The area is inhabited by a squid-like tribe. Squids!
Besides squid people, the game also has bug collecting. The bugs can be used in potions.
Another area is called Fun Fun Island, which sounds, for lack of a better word, fun.
What else? There's swimming and a whip. More in the screens.