It would be interesting if, say, when you upvoted something then your perception of upvotes and downvotes from people who similarly upvoted that thing were subtly changed and so forth. In essence, by upvoting something you would be changing your perception of the universe.

Which, I guess, is kind of how Google works in the long run, and also would tend to self-select people into like-minded groups. Overall, I think that our options are somewhat limited -- we either end up in a self-selected community or in a self-selected sub-community. E.g. I was "repelled" by digg because any politically "liberal" comment I made would be downvoted to oblivion within minutes. While similar things would happen on reddit if, say, one said things critical of libertarianism, I didn't find this quite so frustrating, and simply learned to curb my views accordingly.

Here on Hackernews (which I find to be the most reasonable community since the glory days of slashdot) I have learned to accept that, say, being critical of Android or having anything nice to say about PHP is likely to lead to a lot of welts.

I haven't seen any site do anything more creative then up/down. Maybe crowd-sourcing the ranking of content is a dead end road. I wonder what a better solution could be.

I have a feeling the first site to dramatically improve content ranking is going to explode.