A few of us were talking in chat today about the need for multiple channels. Foldit has done this, and I think this would be very helpful for those who wish to talk about puzzles/science/other eternal-related stuff while chat is busy (especially with the now often off-topic stuff).
I'm in favor. There are difficulties though, and not only technical ones. If the point of multiple "channels" or "rooms" is to be able to avoid off-topic noise, then who defines what is on-topic or not in those channels, and who enforces the policy when deemed necessary?