Very interesting idea. It might be better to favorite them from the chat itself, instead of from Discover, since I think people should at least visit the chat once to decide if they like it enough to come back.
How do you think it's better and easier ...
The away symbol also makes sense -- thanks for the suggestions! I'm working on other stuff at the moment (profile re-design, editing messages, etc) but if you have other ideas, feel free to post. :)
Ok, I'll write other suggestions soon