Rhythm Heaven Wii (Minna no Rhythm Tengoku in Japan) is brilliant. We know this because Rhythm Tengoku was brilliant on the DS, so logically the Wii version, which is larger, prettier, and more complex, will be just as brilliant if not moreso.
Videos like these go a long way to show us just how awesome the game is. I will be clamoring for the soundtrack as soon as it becomes available…if it isn't already!