Side buttons on the Magic Mouse would be nice for Exposé/Mission Control.
I also agree with others who say that they would like a numerical keypad on the wireless keyboard. Also, separate cursor keys (like on the wired keyboard) are perfect for gaming (forward, backward, left and right).
I really can't see them updating these peripherals though, what with all of the other things being updated.
Makes me think ... if/when I order one of the new iMacs, will I go for the Magic Mouse or Magic Trackpad? That's one thing I'm really not too sure about. Which of the two will you be selecting, if you buy a new iMac?
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... I love tap-to-click on the trackpads. I really can't understand why so many people don't use this feature?
So much faster, easier, and comfortable than physically pressing down on the button/s all the time ...