I suggested this earlier this year but it never gained much traction. I'd still like to see this implemented, so I'm re-posting.
I propose a chat integrated into the forums. It could be Flash or IRC or AJAX based, or if possible (and everyone's dream), integrated with the Guns Of Icarus client chat. Ultimately it would not require separate log-in from members of the forum (IRC requires sign-up).
Why? It gives everyone a (official) place to lurk and hang out in real-time, as opposed to using the forums or having to keep the game client open (even if we do, that chat is still pretty crap) which is impossible for some people (eg. mobile users).
Why would we not create our own IRC channels or create a group on Steam etc? People prefer an official place to go. It would have a link in the header of the forum. Staff would be encouraged to sit in there when possible, possibly to offer real-time support if they choose to.
Before you go saying that it'd be hard to implement: no. No it isn't. I have plenty of experience with forums and integrating chat systems into them. There are SMF modules for chats you can just dump in. Have a search:
http://custom.simplemachines.org/mods/index.php?action=search;basic_search=chat It literally takes 5 minutes.
I'd appreciate input from everyone, especially the staff.