User blog comment:Ohmyn0/Introducing Chat/@comment-2194058-20110429002555/@comment-118323-20110429211002

Private chats are nice to have, and we'd like to include them. We haven't made a final decision of when we will add them, but they're on our list of requested features.

As for "evil plots to take over a wiki" I think you've been watching too much James Bond. ;-) But seriously - the great thing about our wikis is that we have communities that will help thwart vandalism, bad grammar, and evil plots.