Yahoo! Messenger Public Chat Rooms
The Yahoo! Messenger Public Chat Rooms will close down on December 14, 2012.
Yahoo! Messenger Pingbox
As of December 14, 2012, Pingbox will no longer be available on Yahoo! Messenger. If you’ve installed Pingbox on your blog or social networks, please click here to learn how to uninstall it.
Yahoo! Messenger interoperability with Microsoft Windows Live Messenger
Yahoo! Messenger will no longer be interoperable with Microsoft Windows Live Messenger as of December 14, 2012. Microsoft buddies will still appear on your Messenger contact list, but they will be greyed out, and if you try to send instant messages to them, the messages will not be delivered.