There's no firm timeline at the moment - I'm writing it as quickly as I can and putting out new regions in plain text format when they're done but I'm not allowing myself to rush it. Tentatively I think it'll be text complete by June.
As far as multiple players, it's not designed for that. You're welcome to try but I have no idea how well it would work. That said, the license is very permissive so feel free to hack it to work however you'd like it to!