I think that collaborative filtering need a niche market to grow. Digg it's on the Technology news market. Reddit too, but there are many political news too. But Yahoo Buzz?
If you don't have a niche market, it's very dificult to focus and grow the community. Nobody is going to vote, only because they can.
If you don't have a niche market, it's very dificult to focus and grow the community. Nobody is going to vote, only because they can.