Dragon Age: Origins Return to Ostagar DLC Released on Xbox 360

BioWare's Chris Priestly brings word that Microsoft has "unexpectedly" released both Return to Ostagar and a new patch for the Xbox 360 version of Dragon Age: Origins.  The addon will also be released on the PC later today and the PS3 "sometime later", but we'll let you know when either of these events transpires. While we wait it out, here's the 360's description:
The battle of Ostagar laid waste to your order and claimed the lives of many great men and women, including the brash King Cailan and your mentor, Duncan. Now, there are rumors that a fellow survivor of the battle has escaped from captivity and is seeking the Grey Wardens' help. The time has come to make your return to Ostagar and exact revenge upon the darkspawn. Includes: (1) A return to the battlefields of Ostagar, now thick with darkspawn encamped amidst the snow. (2) An opportunity to regain the lost arms and armor of a king. (3) A second chance to add Dog to your party. To find the survivor: (1) Play through Dragon Age: Origins until after the village of Lothering. (2) Travel to Bann Loren's Lands along the Bannorn's northwest border.