No one knows what's with the apple mice except Steve Jobber (Jobs).
If I had a Mac (thank god I don't) I'd use a Logitech USB MouseMan Wheel (probably optical), any USB mosue can work, and Logitech makes drivers for it.
As for the 1 button thing, apple's button is the same thing as our left button, if you press&hold the button, or maybe hold a keybaord key while you click (or something like that) you get our right button (popup menu).
Just get a Logitech if you are stuck using a Mac, they are the best mice anyways, PC, Mac or otherwise.
Now...if an MS Natural Keybaord would just work, they'd have some decent input devices...