I don't either and there ought to be. We could start an AZB chat on IRC.
IRC is still the biggest chat network in the world, but it uses protocols from over 20 years ago so today's kids don't get into it much. There are modern all-in-one chat programs like trillian and pidgin that support irc. It's really the best way for people to chat online.
If anyone's interested in giving it a try, reply to this thread and I can explain how we'd set it up.
Otherwise, we get in some chat during a lot of the live streams you see people post about. These streams usually have a chatbox under it and people talk about anything, not just what's going on in the game.