This certainly looks like a promising thread!
I'm new at this so i may be mistaken, but i think that a script that i'd like to see created is still missing from the most excellent list of scripts in the OP. Here's what i'm hoping it would do:
* L and R relates to the mouse-buttons *
Hold L and R
If L is Pressed = Release L then Re-Hold
If R is Pressed = Release R then Re-Hold
So it's practically about reversing the held/unheld status of the mouse-buttons. I figured out how to do about the same thing with Oscar Mouse Editor, but i couldn't figure the variable system out so both L and R are released and re-held when either are pressed, rather than them being separate.