I’ve always considered weblogs and the ability to comment on them to go hand-on-hand and never thought otherwise but lately I’ve grown more akin to the fact that you may not always need them. It all depends solely on how you present your content. Is your content conversational or presentational? Cameron provides a well put metaphor on the matter:

Is a conversation the best metaphor to describe a weblog with comments? In my opinion, a better comparison would be a presentation. A few hundred attendees come to a specific area to hear what you have to say. And commenting would be like allowing each audience member who desires to take the podium and say whatever they want anonymously.