The Unlock the Mines of Moria site has been updated with a new game you can play to "unlock" the fabled door to Moria. It's called King Under the Mountain and it's a fun consumer of time.
D&D dorks will squeal with delight when they see all those octahedrons.
An occasional ad will interrupt your fun, tempting you with a 7 day trial of Lord of the Rings Online. Not to be unexpected given the entire site is part of a promotional campaign for the Lord of the Rings Expansion: Mines of Moria.