The Elder Scrolls V: Skyrim Dawnguard DLC Announced

Downloadable content to be available for the Xbox 360 version of the game this summer
As it was speculated on March 23rd, 2012 (story), the name of the first DLC (downloadable content) for The Elder Scrolls V: Skyrim is Dawnguard. Bethesda Softworks announced that this DLC is being developed for Xbox 360 - no word on PC and PS3 versions yet.
Dawnguard is scheduled for this summer - details will be unveiled at E3 2012.