Just tried findka out and going back to my comment about Stumbleupon, what I used to love the most about it was reading the reviews about the content I ^stumbled upon^ before even looking at the content. Pretty much the same manner in which most people use HN.

Additionally, reviews led to discovery of people with shared interests, when I saw the same people liking, sharing and commenting on stuff I liked. Following these people then added another layer of filtering to my ^stumbles^.

Might be food for thought.