The LOTRO Game Servers and http://myaccount.turbine.com will be offline for maintenance on Saturday, April 27th from 5:00 to 7:00 Eastern (-4 GMT). The forums and wikis will remain up, but players may not be able to log in. Thanks for your patience, and we’ll see you back in the game soon!
FYI: This maintenance is to address recent login issues seen periodically over the past couple of days.
Source: LOTRO Forums