Not really an idea for Ardour but as we can now write Lua scripts, it would be great if we could share them easily (maybe does this exist but i didn’t find it)
You’ll find some good material for Lua scripting at the Mixbus forum:
http://mixbus.harrisonconsoles.com/forum/forum-14.html
I think this a great idea, a public git repo might be a good place to store user donated Ardour Lua - scripts.