Cordless TrackMan Wheel Mouse Optical USB/PS2
This is my choice. Great range and battery life. This trackball/mouse uses one battery for every 6 in my wife's Bluetooth Apple mouse.
I have worked in electronics (bench work) for, well a really long time and my Nintendo playing time is down because of it. Notice I blame the turning of screwdrivers and not gaming for my condition. Any way this is my input device of choice.
Now as the the Apple Mighty Mouse I have read that some are having real issues with the ring finger click. It matters not, I love trackballs and this one rocks. If you do not need a bunch of programable buttons, or need one of those video wheels, this could be for you too.