The idea is nice, but I'm seeing a major implementation problem here. First of all it should probably be bettter to write a server-side plugin rather than have a zombie player join a server to log and relay the chat. Since the jj2 chat is designed to reflect the usernames of people in the current server, we'd have to "hack" the chatline to incorporate 3rd party usernames. I'm guessing this can be done by simply appending the nickname at the beginning of the text and then send the whole line as a normal console chat, but this would break some stuff. Also, what happens when there are two players with the same nickname in two different servers? Another important matter is how the chat propagates through your servers i.e. whether to use a centralized or decentralized approach.
About the exit parts... that can be done with greatest ease by using some way of scripting... that's if I ever finish the scripting thing I've been working on.
Gry, don't slap me