Shoutbox

First of all, it's impossible to notify when a user closes a conversation, due to the fact that Windows Live Mesenger does not send anything when a coversation is closed, only ends the session when the user does not send anything for a certain time (a time-out).
Also this means when a conversation is opened the previous session has to be ended in order to let Live Notifier notify you. So basicly there's not a big chance you will be notified when a coonversation is started or ended. That's what we call "unstable".