Samba De Amigo for Wii could be good. (I've only got the Dreamcast version with the proprietary Maracas, but I don't see why the Wii Remote set up won't do just as good a job) I love that game!
Also if you have a PS2, Frequency and Amplitude are worth a look. Both great games from Harmonix prior to their big break through with Guitar Hero and no plastic peripherals required!








