Interest groups

Hmm... the board (or sign-up sheet) idea could work for immediate things like APQ or Pap - the organizer would whisper people on the list one after the other until he gets a full party.

But I think that if you're trying to get a CWKPQ or zrun together, it would be incredibly frustrating to keep whispering one person at a time trying to set a time when enough people can make it. For that, you really need something like party or guild chat, where everybody can hear everybody else (although it might get really noisy with everybody yelling when they want it to happen).

Not even that, imagine you get a notice below, like joining a party, only you have to accept or deny it. You deny it, you get out of the list. You accept it, you get into the leader's list, ready for a run, until the rest joins. No window popping and killing you while on training, and yet makes it work.