Would it be possible to add in a sound whenever a new message is sent. Not on EVERY message. But after x amount of (example 2 mins) of inactivity, when a message arrives the chats makes a sound to alert you, if you were off doing something else. It would also be nice to have some sound for when someone joins the room.
I has been disscused here : http://www.phpfreechat.net/forum/viewtopic.php?id=19 Playing sound on every platforme and without external proprietary plugins (as flash) is a difficult task. I will not work on it but if a clean solution is found, I will be pleased to integrate the contribution.
However, it is planned to add a "page title notifier" in the next 1.x version. (look at the roadmap)