Read on VentureBeat about a new Digg killer/competitor called coRank that launched today. The idea here is that it's hard to game the system since your front page is built from news stories that your friends or trusted stories rank and comment on. I like the UI, takes a minute to get used to, but the white space is very friendly.
The problem is that I'm not sure my friends are really pro-active enough to post stories that I'm interested in. So will this work?? Digg works (I think) because it has a small yet dedicated group of users that do a lot of tagging/commenting that everyone benefits from. This coming on the news that Digg now has 1M registered users. Smaller than we all thought, right?