Just a note that late last week, I enabled a feature on the site allowing notification by email for followup comments to forum posts you've written as well as forum posts and blog posts that you've commented on.
This feature is on by default, but you can disable it on a per-post basis with a checkbox as well as account-wide by going to your account and editing the settings there.
A number of people have asked for this feature. Keep in mind that there has long been the ability to subscribe to RSS feeds of comments on posts as well as all blog & forum comments.
Please let me know of any issues with this feature!