I have a logitech mouse. It has your basic left/right click, clickable scroll wheel, and a thumb button. Wireless, and optical... uses recharable batteries, thank god.
I hate the mouse though. I mean, sure it has a thumb button and all, but I can't even bind it to anything inside a game, so it's kinda useless...
Too few buttons too. I must have at least 5 different buttons on my mouse to be happy.
Should give my thumb access to 4 different buttons... and my ring and pinky finger don't do anything either. What a waste of fingers. Mice need more buttons.