This horrible thing is in its earliest stage of planning.
A copy of my notes.txt might (or might not, depending on when they clear the demo server database) be available here (thanks, Etherpad!); if you know what this is about and feel the need to add something, please do so!
Update (2013/08/05): This horrible thing is no longer in its earliest stage of planning — we have actually written some code already. But it is not in a state suitable for public display just yet :-D