I'm definitely in favour of implementing some sort of server status notification for us to know whether or not the server is down or if it's just our own internet connection.
Another suggestion, one concerning in-game play; make notifications for the players that the server will be offline so that they can save and log off safely without risk of losing levels, equipments, etc. It'd also be nice if you could tell us how long the server is estimated to be down.
Of course that would just be an educated guess, but the latter is better than not having any idea as to when the server will be up and running again.
Agreed? Post up if you do.