It looks like the room was automatically judged "not worth retaining" by the system:
Rooms will exist indefinitely, so long as there is at least one person actively talking in the room. A room is considered worth retaining if it has more than 15 messages by at least 2 users.
Rooms not worth retaining which are inactive for 7 days will be deleted. ...
I tried to capture most of that content in a community wiki answer to the question, and I'm not sure the chat adds that much in this case.
On reflection, you're right: That chat doesn't add much value, so I'll delete my comment linking to the resurrected chat room.
The 404 is definitely undesirable - is there a way to make a chat be persistent, and not ...
Please edit your question to clarify it and respond to the comments
I simply meant that your responses to comments should also be edited into the question body, as part of your improvements. It helps to have all the information in one place. No one wants to read a long chain of comments just to understand the question.
I did not intend to suggest that you ...
Well everbody, thanks for participating. As you can see by following this link:
We successfully elected three candidates, namely:
as the new moderators of the site.
There was a townhall chat:
2011 Moderator Election - Town Hall Chat: Tuesday October 4th, 22:00 UTC / 6pm Eastern