Message you get when logging in or visiting the official site:

The Turbine account system and login servers will be brought down for maintenance on Thursday, April 12 from 8:00AM - 9:00AM EDT.

During this time, players will be unable to register new product keys or update account information. Players will also be unable to log into the game, but players already in the game when the system is brought down will be unaffected as long as they do not log out or get disconnected.

Thanks for your patience!

Log in early and hope you don't get disconnected!