Chatrooms tend to be places where sad, lonely people can live out a virtual social life while neglecting the rest of their real life. In this regard, (along with much of the internet) it is like an interactive form of television.
A chatroom, by itself, isn't necessarily a good idea but it would be good to have organized chat sessions... Maybe once a week at a regular time, where Ven. Dhammanando, Ven. Appicchato, and Retrofuturist could step in for an hour, to discuss dhamma. This way we avoid the problem of either the chatroom being filled with people just slothfully hanging out, engaging in wrong speech on the one hand, or being totally empty (or at least empty of the people who'd be most appreciated -- like Ven. Dhammanando and Ven. Apicchato).