Okay, so today I read Seth Godin's post about not commenting. I was expecting to vehemently disagree with Seth because, in principle, I like all blogging functions that enable or extend the conversation. I was pretty annoyed, you will remember, with the suggestion that people should not link.
But Seth's point is a bit more nuanced - he doesn't have time to join in the conversation himself. This, much more than linking, seems a valid point from a blogger with super-heavy readership. We've all seen times when a major blogger will say something controversial and end up with hundreds of comments. Since they aren't threaded or linkable directly, it is hard to have a real conversation in blog comments - especially if you get a whole lot of them.
Seth's blog does one thing that totally takes the curse off this. He allows trackbacks. Many bloggers have comments but not trackbacks. Seth is the other way around. I applaud this. Trackbacks encourage further blogging which is important to conversation - much more than comments.