Thinking about it, we could install a chat room, if there's sufficient interest. A chat room is simply a development of the original Internet Relay Chat system, that started all the current social networks that now exist.
Essentially, it's simply a 'live' forum, where what you type appears in the chat room as you type it, thus allowing the group that have logged into the room to have a virtual conversation. It differs from PMs in that the messages typed remain in view and the entire set simply scrolls slowly upwards as time goes on.
Don't like chat rooms myself, and the attraction tends to wane fairly rapidly, but we could install one, if you wished.