In regards to the social graph bit you added. Good point, however I want to stay away from amazon style recommenders, there are plenty to go around already. A u

In regards to the social graph bit you added. Good point, however I want to stay away from amazon style recommenders, there are plenty to go around already. A users behavior is immaterial to external content's relevance to a subject matter. Yes, if it were to account for your behavior there could be ancillary benefits, but I'd like to start from a purely objective approach to identify stuff as defined by category.