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Disenchanted's linkback is something similar to what I've been working on. If I understand their's correctly, I think my implementation is better. If you link to any specific post on this page (to a URL given by a [link] link,) and then follow that link to this page, it will be noted by this page below the post you link to. I call this reference logging. It shows up below the post as [1 ref]. Click on that and you'll see the reference along with a link back to the page that made it. My system even goes to your page and grabs a little bit of text around the link you made and adds that (sort of like a comment.)