... for succesful blogs? well... I *hope* so -- otherwise I got it all wrong! (last comment for that blog entry)
It all depends on what you want to get out of it and how it will hold up for the long run. I think the involved one on one conversation ceases to work when you have a huge number of people. For *me*, that is an essential ingredient. Otherwise, it’s just information (which can be really good and useful in itself) but I think that *in the long run* people will gravitate towards venues that offer more than that. That’s why I agree with Robert that very popular blogs have a problem in their hands — not an “unfixable” one, but a real problem that they need to address.