What about using something similar to the wiki, especially for mouse actions? (I've had to explain what 'MMB' or 'RMB' etc. stand for occasionally).
For example:
Shift + 
(<kbd>Shift</kbd> + ![MMB][MMB])
AltRMB 
(<kbd>Alt</kbd><kbd>RMB ![RMB][RMB]</kbd>)
Alt RMB (<kbd>Alt</kbd><kbd>![RMB][RMB] RMB</kbd>)
CtrlShift
(<kbd>Ctrl</kbd><kbd>Shift</kbd><kbd>![MW][MW]</kbd>)
Ctrl 
(<kbd>Ctrl ![LMB][LMB]</kbd>)
⌘ Cmd⌥ OptQ (<kbd>⌘ Cmd</kbd><kbd>⌥ Opt</kbd><kbd>Q</kbd>)
⎈ Ctrl⎇ Alt↹ Tab (<kbd>⎈ Ctrl</kbd><kbd>⎇ Alt</kbd><kbd>↹ Tab</kbd>)
⇧ ShiftD (<kbd>⇧ Shift</kbd><kbd>D</kbd>)
Since this is kind of a pain to type out, I'm thinking of modifying the kbd script to do this automatically. I have modified the kbd script to do this automatically now.
@David does this work: ⎈ ⎇ ?
