Hellforge community that is getting some traction is Agamemnon's look back at the MMO failures of 2008. Included are looks into why Tabula Rasa, Hellgate: London, Age of Conan, and Pirates of the Burning Sea either outright failed (in the case of Tabula Rasa and Hellgate) or were unable to get the subscriber numbers they expected with their launches.
What separates this blog post from the myriad of other posts on the same subject is that the article ends with the many things that these games all did wrong and other developers should learn from. Little things, like listening closely to the feedback from your beta testers, fostering a community, and learning to stay away from the concept of "we'll patch it to perfection." It's a good analysis of the many failures of other games, and a kind tip of the hat to the things an MMO can do right, such as Mythic's openness with Warhammer Online.