Yep - public. Feel free to sign up and test it out. http://smarthomehub.net Thanks! I'm already getting user complaints, and people signing up with multiple accounts. Ugh.
Running 2.1 Stable, fresh install, and user passwords don't work. Users can register and post, but if they come back after signing out, they can't get back in without resetting their password... which also logs them in, but only until they go away again.