"Even if you never read a single thing Dave Winer wrote in his 439 years of blogging, it's worth taking time to study his ideas about comments on blogs (he doesn't allow them)."
...to the extent that comments interfere with the natural expression of the unedited voice of an individual, comments may act to make something not a blog.... The cool thing about blogs is that while they may be quiet, and it may be hard to find what you're looking for, at least you can say what you think without being shouted down. This makes it possible for unpopular ideas to be expressed. And if you know history, the most important ideas often are the unpopular ones.... That's what's important about blogs, not that people can comment on your ideas. As long as they can start their own blog, there will be no shortage of places to comment.