I just added a little plugin called “subscribe-to-comments” that gives you the option to receive an email whenever someone leaves a comment to a particular blog post.
Not that there are gobs of comments on this blog, most folks seem to just send me emails directly. But there are the occasional posts that do garner some comments and, if you wish to keep up with them easily, this should help.
Just look for the little checkbox at the bottom of the blog entry page.