The whole post, and everything he links to from his post, is (and are) worth reading. But here’s my favorite bit, regarding comment threads on newspaper articles:
It’s an issue for the news industry because tending to comment threads is not part of a journalist’s traditional job. But I would argue that it is now and they ought to get busy doing it. For one, the journalists that do it and do it well will be better read. And they’ll be better informed. They’ll get tips in the comment threads. They’ll get constructive criticism that will help them do their job better. And they’ll get leads on new stories before others will.
Eat Sleep Publish is a Seattle-based blog that explores the difficulties and opportunities currently facing the publishing industry. 
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Do you have a link to his post so I can read it?
Link?
Sorry guys – not sure how I let that slip through! Here is his post:
http://www.avc.com/a_vc/2009/07/why-comments-matter.html