Alert me when someone responds to my comments.

If I post a comment on a page, it'd be nice to know when someone posts a reply to that comment. One of the great things about M&C is that it so often elicits lively discussions from a diverse group of people. As it stand, though, the conversation is hindered by the fact that one must keep returning to previously visited pages in order to see how the conversation has advanced. A notice in my Inbox that says "someone has replied to your comment on [insert link here]" would be perfect.