Some preliminary reading I've done on this says that Wii owners may be a tad disappointed with it. From what I've heard, there is some sort of a swing meter and the "movements" of the game are not solely dependent on the user's movements, as the original Wii bowling is designed. So, we will get ball choices, characters with hands, feet, and clothing, but reduced control of the mechanics of the swing.
Again, this is just what I've read/heard, so take it for what it's worth.
--Chris