It is possible to calculate a kind of user contribution weight in articles. That is, if I as Jeblad writes the whole article about Norway I would get a ucw of 1.0, if I write half of the article I would get 0.5, and if I write nothing I would get 0. Those numbers could then be used to adjust the numbers of page views to show how high impact I as a contributor has on the total impact of Wikipedia, and also possibly give me an overall rank of "importness" or place mo on some scale of importness. Perhaps a kind of top-tier scaling.
Of course this has very litle to do with real trust, its only a measure of my impact on the overall product. It is although a very visible factor that may have some merit as a kind of internal honour for good work.
I think most of this is already implemented by de Luca and his friends, it simply has to be reorganized. It is not trust but the weighting mechanisms are much the same.
John