I would kill to see them used for some sort of Pictochat-style chatting service

Or maybe make them have more of a use in the next smash game?

Something in a webfishing style with Miis could be awesome

An open world addition to the wii sports franchise where you can explore Wuhu island and play a bunch of the existing sports and maybe more little minigames here and there (Wii Party style games, perhaps) to rack up score and place on a global leaderboard would be R A D

Could also have an "explore the island, solve the mystery" style deal with Wuhu island

Island flyover was nice, but it didn't have much to do besides seeing some cool sights