CommentBack is an idea about sharing and giving back comment to the original content source.
With this system will be created a social network connecting the content and all the comments about it. So, after reading the content, everyone will be able to find the places where it's being discussed.
You can read the CommentBack Specification [Draft 3]. If you think you can improve it, help us to write a better document!
If you're interested and want to contribute in any way to this idea, read here how to help!