simply ask again, because it would be awesome!
I use this feature on a daily basis.

You may already know Emacs' macros. It's pretty
simple: Just press F3 and Emacs starts to record
all your key presses, press F4 and it will stop
recording. Now everytime you press F4 again,
Emacs will replay the recorded key presses.
Here are some demonstrations:
http://www.youtube.com/watch?v=1YNA-VA77vw
http://www.youtube.com/watch?v=zropjwVQlWQ
http://www.youtube.com/watch?v=LlMU_KYjXI0 (bit long)
Scintilla supports recording macros, so it shouldn't
be hard to implement.

Cheers!