The eternal rathole! But we've got a decent requirements doc started: https://public.etherpad-mozilla.org/p/fedmud

You can join us on #fedmud on irc.hashbang.sh if you want to.

I am considering in 2018 taking a month where I do nothing but implement this (and do the contracting I need to to stay alive). Maybe that's absurd. But I think I could do it and am maybe one of the few people that has experience in all the relevant areas.

We'll see, I suppose.