Marco Arment talked a lot on Episode 59 of Build and Analyze about the death of blog comments. You can listen to the show for his explanation of this, but basically, while some commentary on blogs has value, most of it is garbage. These days, the way to offer commentary on an issue is to create your own space for it. If it doesn't suck, people will link to it and read it. If it does, they won't. That sounds fair to me.
So this is my space for discussing the things that matter to me. Read it if you think my opinions don't suck, and feel free to completely trash my obnoxious opinions in your own forum. Few things are as fun or productive as a healthy argument.