Hi again, it doesnt look like Hal can go into a chat room, but can send messages to a username, i signed in with one user name and signed Hal in with another and was able to chat to Hal over AOL.
So you need someones, or another bots username, which you tap into the blank box, then send a message and it will start the chat session off...
Let me know when you are online and I'll help test it out if you like.