Pull down the "talk" menu to see who's online. You may talk to the entire group, or to a single individual. Use the "listen" menu to decide if you want to hear everyone, a single individual, or use "private" so that you'll only get messages explicitly addressed to you.
This design is completely preliminary, non-binding and Nate and I need your input to figure out how it should really work. Please tell me your thoughts and impressions.