Gnu, I'm ambidextrous but since schools typically taught right-handed there are some things I do with my right hand, like writing. There are other things where I lead with my left hand. My track ball (I agree with Rap - I love it - I hate having to run a mouse all over when I can simply roll it with my thumb). Trouble is, they're also made for right-handers so I don't have a choice, unless I want to start scrolling with my ring or pinkie fingers. Using a mouse (someone else's) now is partly out of habit and partly out of placement, since most people put the mouse on the right.

Now when it comes to the undomesticated variety, if I get them with any handedness I'll wring their scrawny little necks. They're hard on the garden.