I have no idea if this is actually useful or not, but here’s a chat/communication window. It uses the site https://tlk.io/, which allows you to create simple instant forums, where I don’t think participants even need logins (although you can use your Twitter or Facebook accounts). It’s basically open to anyone, and the channels are owner-free. The messages/post also appear to erase themselves after a certain period of time.
I created an “Amdall Gallery” channel: