Awhile back, I wanted to make a digg-style collaborative filter for wikipedia articles. Still haven't done it. But Thoof is basically the inverse of that idea: it's a generalized digg clone with that's also (sort of) a wiki.

Here's the screencast. There are lots of smart features, but so much friction built into the process that I don't think it'll ever take off the wiki aspect is a little cumbersome. You can submit anonymously, though, which makes the process easier. (Bonus: saying the name of the site out loud makes you sound developmentally disabled.)