Lord of the Rings Online as a platoon of content is double-timing it to a server near you. Update 5: Armies of Isengard is the game's first post-Rise of Isengard release, and it's been highly anticipated as it will finally add the long-awaited instance cluster to the endgame. This cluster contains five new dungeons: three three-person, one six-person, and one twelve-person.
In addition to the cluster, Update 5 is including the next book in the epic storyline, The Prince of Rohan. Through it, players will gain a nifty set of Ranger cosmetic armor and participate in an epic battle at the gates of Orthanc. The update also will add an instance finder, unified currency, a LUA plugin manager, a reputation update, and far, far more.
Oh, and there's finally coffee in the game. Mmm... coffee.
Turbine has posted the official patch notes for Armies of Isengard on the site, so you can read up on all of the changes while you're patching the game!