[GreenNight]

They could add google groups to the google+ environment.

Create a minecraft group with only the manager being able to post there but that anyone can see and you have what he wants.

Create a minecraft group with open/moderated subscribership and you have a typical forum.

Create a minecraft group with private subscription and you have your private channel.

For this groups should be both a persona and a circle. The group persona is who you follow to read, the group circle is who will have access to the information (like in the google groups).

Now it recognises the groups and gets the images from there if you add one, but there's no place in the group to add "accept posts from google+", and no place in google+ to "read from the groups I'm subscribed".