There is both a SPOILERS comment (to discuss the DLC) and non-spoilers thread (to discuss issues relating to DLC availability, problems, etc.) on this post. Please put all spoilers about the DLC behind an LJ-SPOILER cut. Thanks!
For PS3 and Xbox360 players:
Unfortunately, it was announced that this and all future DLC will only be released on PC, PS4, and XboxOne. :(
The general release Dragon Age: Inquisition "Completed Story" discussion post that was previously pinned can be found here.
The "Jaws of Hakkon" DLC discussion thread can be found here.