Great article! I would also suggest to add a plugin or similar to your blog that allows readers to subscribe to new comments, I am using this one (it's free)
http://wordpress.org/extend/plugins/subscribe-to-double-opt-in-comments/ Every time somebody leaves a comment on my blog, s/he can tick a box to receive an email when a new comment, on the same post, is posted. This way it is easier to keep track of online / blog discussions. I personally find it very tedious to make a mental note of a blog I have commented on and check it every few days to see if somebody has replied to my comment ...