Comment reply notifications… where are they?

I can't seem to find any way to view notifications of replies to my comments. Is this by design, to discourage long discussions or flame wars? Either way, it's pretty annoying to have to keep 6-8 articles open at once for extended periods to see if anyone has anything to say to you. What's really the point of a "reply" functionality if the person you're replying to never knows about it?

Implementing this wouldn't have to be done through email. It could be as simple as a list of replies on your account page (the "my posts" section would be a good place for this), with links to take you directly to the comment in question.