Well, it depends. If your blog is promoted to the front page, it will certainly garner more interest than a forum post would... Articles generally have 1,000-3,000 reads before they rotate off the front page and go into the archives. You definitely won't get that with a forum thread. As a blog, it's hard to say how many comments you'll get... I was looking last night and several of the blogs had healthy conversations going in them. All in all, we want to improve in this department. But given each of our individual workloads, it's not something that's going to happen overnight.