When I set up a match, sometimes it can be a minute or two before posting. Especially if it's late at night. I would LOVE a little beep whenever a person joins the lobby. While we're talking about lobbies. Can't wait for private lobbies. Really want those.
Yeah... trying to get all 10 people into an FFA last night was... interesting. Had some lovely chap tell me "If you wanted a private game you should have set it to private".