Bethesda recently announced a beta program for the Xbox 360 version of Skyrim's upcoming downloadable content pack, Dawnguard. Beta testers will receive an Xbox Live code for the complete content pack, including achievements.
All it takes to apply for the program is a valid email address that is registered with Bethesda's official forums and a minute to fill out a brief survey. Applicants will be chosen in roughly one week.
Skyrim's Dawnguard DLC pack is slated to launch this summer for 1600 MS Points ($20).