Commentful is a web service and Firefox plugin that helps you keep track of blog comment conversations. I have been using it for the last few days and it seems to work pretty well.
Commentful is a service that watches comments/follow-ups on Blog posts, Digg submissions, Flickr pictures, and many other types of content. When ever there is an update, such as a new follow-up or comment, Commentful notifies you instantly.
First you have to sign up to the web service. When you have an account you go back and download the software from your account screen. The plugin is customised to your own account details. When you make a comment you right click on your comment and click “Add to Commentful”. A little light bulb in your Firefox status area alerts you to new comments on the sites you are tracking. Pretty neat!
While it is too early to say if I will use it longer term, the few days I have had it installed I have got a lot of use out of it and caught up with some conversations I would have otherwise missed. Not every comment box seems to work, but it has caught most of them.