Add the ability to 'hotkey' mouse clicks as well. My mouse, which is a fairly standard USB mouse, has seven buttons. Three are normal buttons, but the other four are set to other things I almost never use. It would be great to be able to set these buttons to extra key-presses, such as the back button, Ctrl-W, which closes the active tab, or even hotkeys in video games! Including the mouse would be a great way to expand and differentiate an already effective product from its competition.