Any USB mouse will work. If you want a two-button mouse and/or a scroll wheel, take one of your PC mice out of the closet and plug in into the side of the keyboard. Voila.
Much more annoying is the lack of a forward delete key.
Fair enough, but it is a laptop. (Full-size Apple keyboards have forward delete keys.) If you're that hung up on one, why not just program one of the f-keys to perform that function?
Regarding forward delete, if it's not too much trouble, how would one program one of the f-keys to forward delete? Or where would I go to find out how to do this? You would have my undying gratitude, this is the one and only thing about my Mac powerbook that drives me crazy. Thanks.