I'd love to be able to re-map the functions of the buttons on my mice-- for instance, if I didn't want double-click to toggle full-screen mode, but something else.
I would think it would be really easy to impliment this-- just add a few new lines into the Hotkey settings window of the preferences. "Mouse Wheel Up" and "Mouse Wheel Down" are already in there-- why not just add "Mouse Left Click," "Mouse Right Click," and "Mouse Double Click" to that list?