MSN groups chatrooms are not being shut down. They are shutting down the public chatrooms in order to protect children. Ours is considered to be a private chatroom. If you are a member of a group, you will still be able to chat in that group's room.
The problems right now could have something to do with the overall upheaval at MSN but be patient, the group room will be back. You may need to delete your chat control, dump cookies and temporary internet files, then re load the chat control. Some people are getting in by doing these things.
This info found at Community Feedback.
Annie