The Messenger Plus! Forums will be down on Wednesday night between 8 pm and 9 pm (Pacific Daylight Time), or 3 am and 4 am (GMT) while they are transferred to a new server.
The server we're on now is just temporary until the new server is ready. Hopefully the new server will be more permanent and we won't be moving around like this anymore. It's a much faster machine, so it should be able to handle the forums better.