Hey there,
sorry for such a long delay before replying. Nothing has really happened on this project for a year. But if you have the time and want to take charge, I would certainly be interested in attending meetings and helping out with stuff.
Basically we had a draft for a charter (I think linked somewhere in the thread, but I can find the link in case there isn't one yet), and need people actually doing the work.
The idea generally was to unify a bunch of library functionality under the "mail" crate, which the owner said can be transferred once a better library exists to take its place.