"Metalinker takes a very simple approach – every time you put a link into your website, metalinker uses javascript to add a link to the page on blogdex that lists other people talking who have mentioned that link. And so with just a couple of mouse-clicks people reading your site can read a webful of opinion and debate…"
This script automates the "other linkers" links I manually add from time to time. However, Blogdex should be an API to make this application more compelling. The metalink wouldn’t appear if you’re the only one to have posted any given link (I hate links to emptiness), and the number of other referrals to that link (e.g. [3]) would be more useful than just a link to the list of other links (ain’t it getting too meta to make sense?)