Is it also possible to assign volume up/down command to the mouse-wheel?
This is already how it works, at least on my machine it is - without any extra effort (2.2).
I'll elaborate...
Mouse-wheel volume works well when MB is minimised and you hover over any part of the minimised bar or when the bar has focus.
However, if MB is full screen, then the mouse-wheel will have different function depending on where the pointer is positioned - standard.
I don't use other modes so i'm not sure how it operates there, but you can find that out.
@Zak, Nice, I just added another toolbar command, i'm up to 5 (would be more if I could assign more externals - wishlisted, as you know
)