UPDATE (1/26/08 - 4:08 pm (GMT-7): Look in yonder sidebar! Feed links for posts, site-wide comments, and comments on the current post!
Although email notifications of comments are useful, I'd rather monitor comments and replies to comments via RSS. If you can install a plugin, flip a switch, or just make your existing Commens RSS link more prominent, I'd be much obliged.
This request is somewhat hypocritical, as I do not currently offer a comment feed for this site. That will change soon.