Blog comments in general
Reading TB's post on Flame made me think about how, over the past few years, I sometimes find myself getting more out of the "comments" section of a webpage than from the article or blog entry itself.
Not always, of course. Sometimes comments can leave you wishing you could brush your eyes. But if you're lucky, they'll attain a wonderful life of their own and prove more insightful than the words that sparked them. It happens frequently enough to keep me reading.