I agree with John and Ted that while "leader" often has the connotations of boss or controller, its actual meaning is quite broad, really only limited to "when this person does or says something, others pay attention to it as being important". All other proposed terms seem to imply certain *specific* powers, which may not be accurate for all of them. Now, as long as the audience for these announcements is the memberships of the various organizations involved, the terminology doesn't really matter. IETFers know what the role of the IAB Chair is, and the roles of the other "leaders" (if they care). And such meetings help to coordinate efforts that are of common interest. It gets more interesting if the organizations are collectively attempting to increase their influence in what is called "Internet governance", the mass of laws, treaties, customs, business arrangements, etc., etc. that altogether determine how the Internet actually works from the point view of users. Of the seven bullet points mentioned in the announcement, six of them seem to be of this nature. For instance, "Preparations for the 2014 ITU Plenipotentiary Conference". >From that point of view, some care needs to be taken to ensure that the words that are used support the political influence that is desired. Dale