This post on Mashable well deserves your attention.
What are you doing to facilitate quality discussion on your blog or website?
The main assumption is:
News sites should think less about their comments and more about the discussion they’re facilitating.
Regarding building a community, author Todd Olmstead wrote:
I realized that the environment has to come before the content. The scope of my project was in fact too narrow: We were prioritizing the comments themselves, when we needed to be facilitating a better place for discussion.