Ever looked at how Opinion Space works? (http://www.state.gov/opinionspace/ http://www.state.gov/opinionspace/) They build a very simple profile that roughly re

Ever looked at how Opinion Space works? (http://www.state.gov/opinionspace/ http://www.state.gov/opinionspace/) They build a very simple profile that roughly reflects a given user's belief system. This can give much more insight into a user's upvote - if they're upvoting the comment of a user on the opposite side of the "belief space", this is probably a more significant signal than upvoting the comment of somebody who's in the same neighborhood of the "belief space". I think it would be interesting to see how it could work in less-political HN instead of the intentionally-political Opinion Space.