I suggest to add an "Improvisation" section in "Organ Music" to be used as a collection of "tips&tricks" for organ improvisation.
Since the recently "self teaching organ improvisation" post in "Classical" in my opinion was (and still is since it is "in progress") really nice, the idea of having a place where to discuss about improvisation only is really good.
I can imagine some posts:
"how to do a Mozart-style improvisation"
"practicing for improvising a baroque fugue"
"improvisation on a mobile phone ringing during the mass" :)