Dragon Age: Origins The Darkspawn Chronicles DLC Released

As promised last week, BioWare has released Darkspawn Chronicles, the latest set of DLC for Dragon Age: Origins, across all three platforms for 400 points. It's unclear exactly how many hours worth of gameplay we get for our money, but the description seems to suggest that it's at least an hour or two:
Play as the darkspawn! The city of Denerim, jewel of Ferelden, girds itself for war. As a hurlock vanguard, you alone hold the power to make thralls of your fellow darkspawn and drive them into the heat of battle. Heed the archdemon's call--Denerim must burn! Includes: (1) A standalone adventure in which you command genlocks, hurlocks, shrieks, and even the mighty ogres. (2) A look at an alternate history: what if your character had died in the Joining ceremony, and the Grey Wardens marched under Alistair's command instead? To begin this dark new tale: From the main menu, select New Game, then select The Darkspawn Chronicles. REQUIRES LATEST PATCH FOR DRAGON AGE: ORIGINS.