Popularity ranking by number of backlinks count

[edupin]

I would like to install Pligg for a new site but I would like more than just voting system for links ranking.
My idea is to have a algorithm that counts the number of backlinks and comments on a blog post to increase its popularity in py Pligg site, same way as Technorati, Wikio or even Google.
A kind of pagerank : the more the blog posts has comments and backlinks, the more it is popular in my Pligg site.
Is there a mod for that ? Is someone interested in developping one ?