I've run into a lot of mac users over the past few months that are missing a right mouse key. Would it be a good idea to have a key on the keyboard setup as the alternate fire for them?

Yes, but... which one?

that one?? :

It's not ideal to have to press (find) two keys in different areas to get a right click- especially when you are shooting at someone.

here's a tip: go out to compUSA or microcenter or whatever electronics store you have nearby and buy a cheap 5$ mouse. Or are you that poor.

EDIT: ok what I've said may be a tad inappropriate but really nobody will be able to play nexuiz with a mighty mouse/one of those weird circular mice... effectively, anyway...

Can you use just any USB mouse with the Mac OS?

Yes- for example, I am using a 5 button Kensington laser mouse.

Not really any point playing an fps with a one button mouse Getting a multi-button one is always better, right click allows for many stuff in finder, etc. scrollbars are obviously useful too.