Lots of spoilers if you're into that stuff.
A pretty spoilerific list of details relating to imminent Skyrim DLC, Dragonborn, has been published by a beta tester.
The details relate to all elements of the DLC, including shouts, spells, armour and weapons. There's also a new quest, a new summoning power and information on new dragon types. If you want to know all the Achievements, they're listed too.
You'll find all the details over on TheOutHousers.
Dragonborn will be available tomorrow for Xbox 360, and hopefully at some point in the not too distant future for PC and PS3.