I wrote a simple plugin that sends an email notification for new comments posted, but it only emails those users who have already posted comments to the thread. In the case below, Karen, Jerry, Lynn, and myself will all receive email notifications when a new comment is posted. Mason and Jesse (the rest of our user-base… for now) would not receive emails. (Btw, there are new comments posted by Lynn and myself… consider this entry your notification).

Jerry and I both foresee that these email notifications may become annoying and spam-like. In this case, we can assume that we are all actively using the blog and thus should not need reminders to constantly check it. Once (if) we get to that point, we can remove email notifications.