Okay, the chatroom has been shutting itself down, and until we figure out why, it needs re-starting now and then.
If the chatroom is not working, simply click this link, and it will be re-started. (Just close the window that pops up, no need to do anything in that window.) You may need to log in again, but it should then work.
Let me know on this thread when it's needed re-starting.