When it comes to keeping track of comments on blogs, well frankly it's a pain in the backside. I never remember where I've posted anything, and I rarely know if anyone has ever replied.
Which is why this blog now offers two extremely exciting (honest) new features. First is email notifications - just tick the box when making your comment and every time there's a follow-up comment you'll get an email (you can also unsubscribe at any time!)
If you're a feeds person, there's also a new XML feed of all blog comments made.