Including two wheels lets you scroll TWO DIFFERENT THINGS. That would be awesome.
Many games use mouse wheel for weapon switch, and something else for choosing secondary-items (e.g. grenades in Far Cry). You could use it to queue up preselected groups of chat commands usable with the touch pad ("enemy in flag room", "enemies inc to mine", etc), use it for a throttle control (!!), or all sorts of things.
Having two scroll wheels instead of one is not as bad as you might think -- and even just using one still lets you remap them as you see fit anyway.
Many games use mouse wheel for weapon switch, and something else for choosing secondary-items (e.g. grenades in Far Cry). You could use it to queue up preselected groups of chat commands usable with the touch pad ("enemy in flag room", "enemies inc to mine", etc), use it for a throttle control (!!), or all sorts of things.
Having two scroll wheels instead of one is not as bad as you might think -- and even just using one still lets you remap them as you see fit anyway.