Binding a key to the middle mouse button with xmodmap and xkbset
Great, I just found this here. This is how you can bind a key to the middle mouse button (I use the middle mouse button a lot to (a) paste stuff from the clipboard, (b) open links in background tabs in Firefox). I used the pause/break key, so it’s slightly modified. I first had to get xkbset via aptitude.
sudo aptitude install xkbset xmodmap -e 'keysym Pause Break = Pointer_Button2' xkbset m xkbset exp =m
I don’t know yet whether this will persist after a reboot.