Would you guys be interested in combining some of the functionality from http://drupal.org/sandbox/brantwynn/1376658 ?
In the "Relevant Content" Bean Tax plugin the articles are sorted by the number of matched terms between the currently displayed node and the matching relevant content.
IE: Node 1 shares 6 terms with Node 2, Node 1 shares 7 terms with Node 3.
So a "Relevant Content by term reference" would show Node 3 then Node 2 in the bean.
Feel free to lift code or I can co-contribute on this if you guys are down for that.