[anywhichway]

A reddit/HN clone that customizes the content you see based off your voting history. This has been tried a few times before, but I've just never seen one take off. In fact, reddit had this feature when it started but couldn't scale it well enough so dumped it.

I feel like it would increase the quality of upvotes generally because people would know that their votes will impact the future content they see so it may slow the rate at which people up vote just to show they simply agreement and reserve it for actual high quality they we to see more of. That is just my theory, perhaps in practice it would reveal that people just care more about only seeing content they agree with anyway.

[skellystudios]

StumbleUpon sort of does this, although it's more attuned to drag up older content than new stuff. I guess this is because the older the content is, the more data you have to make statistical associations.