Can anyone recommend a simple message room (not chat room) which I can use for a private communication between my users. My idea: to grant some users (2-3 at the most) a specific privilege to talk privately in a message room. none of them would be administrator there. I need such features: - admin panel for adding users allowed to post messages in room - room invisible to anyone except users - filtering not-allowed words - Ajax-enabled so that replies appear immediately - other message room features I have a linux hosting so PHP message room would be the best option. I thought of using a forum for this, but it's too much work as a forum is public by nature and I need something private by nature. Any ideas? Thanks in advance.