I recently got a Logitech cordless trackball and got to experience the joy of setting up all the buttons on it. But then I got to wondering... what about everyone else?
Here's what my... input device... looks like:
Arrow above scroll wheel: Open Terminal
Arrow below scroll wheel: Switch Applications to the right (so that the Switcher that it brings up lets me go between two apps easily)
Up arrow (above thumb clicker): Exposé All Windows
Down arrow: Exposé Show Desktop
Lock button: Open Finder window
Then there are the two other buttons, under the thumb and to the right of the scroll wheel. Those are click and right-click, respectively.
What setups do all of you out there have? Interesting to see what people do.
(I set up my two-button mouse such that Control+Shift+Right Click would perform Exposé actions, so people can chime in if they've done things like that. One-button mice... I suppose it would have to be inventive...)
Here's what my... input device... looks like:

Arrow above scroll wheel: Open Terminal
Arrow below scroll wheel: Switch Applications to the right (so that the Switcher that it brings up lets me go between two apps easily)
Up arrow (above thumb clicker): Exposé All Windows
Down arrow: Exposé Show Desktop
Lock button: Open Finder window
Then there are the two other buttons, under the thumb and to the right of the scroll wheel. Those are click and right-click, respectively.
What setups do all of you out there have? Interesting to see what people do.
(I set up my two-button mouse such that Control+Shift+Right Click would perform Exposé actions, so people can chime in if they've done things like that. One-button mice... I suppose it would have to be inventive...)