Saffron let us know about an update scheduled for the game:

The LOTRO Game Servers will be brought down on Wednesday, March 12 from 6:00 AM - 12:00 PM Eastern (-4 GMT) for an update to the game. Roheryn will remain up and available during the downtime. Thanks for your patience, and we'll see you back in the game soon!

You can find details for the changes here.