Did that happen? I remember a vague thing about the idea a while back so that cliques special interest groups could talk privately. eg we had an 'academics' thread, that some of us might like to revive in current climate of cuts in universities etc, but given sensitive nature of the small world we work in, people feel inhibited.
I understand this is controversial and perhaps the PM thing is one way round but be interested to know if you resolved the private thread issue?