E3Buzz: you're unlikely to need owt else.
Doppler effect: The Wii remote (the Wiimote. Too good.) will have a speaker in the controller, so that when you fire Link's arrow, for instance, you'll hear the pullback and the twang in your hands, and then you'll hear the arrow "travel" to the TV. How. shiny. is. THAT?
(Thanks Dan and Armin!)