CoComment is pretty cool

I’m finding I’m relying more and more on CoComment, a service that keeps tabs on sites where I comment, and alerts me when others respond. It works really well, and it has a nice Firefox extension which provides a visual indicator when new comments are found. It’s made me more responsive to conversations I join on other sites, which is a good thing: nothing’s worse than showing up, leaving a comment, then forgetting to go back and see if anything else has changed.

What do you use to track comments you’ve left?