Personally, you have already the Instant Messenger as Cheetos said who notify you with a Beep when a person post in your thread, send you a pm, join your event, leave your event, send you a friend request etc...
So in my eyes it's enough.
You can find more informations here:
Instant Messenger / Irc.d2jsp.org UpdatesVoted no.
This post was edited by Nico on Jul 22 2015 10:09am