Most bloggers take the comments on their site and work new posts out of them in order to keep the conversation going in a more visible way. Makes sense.
I also turn my own comments on other peoples' blogs in to posts on mine. I figure that if it's worth saying as a response to someone else then it's worth reworking in to a post and sharing it further that way. Take the earlier Mahalo post for example.
I had not originally intended to post my thoughts about Mahalo on the blog but Dave Winers post reminded me of my initial reactions to the site whilst reading the About section so, if they were good enough to be put as a response to his post, then they are valid enough to be added here as a separate item to trigger conversation.
Expect more of this in future.