As everyone knows that sites like Digg plays very important role in gaining traffic. More traffic mean more money. So why not list down all sites with similar link building styles. i would like everyone to add in this contribution so everyone can benifit from this link building effor. Here are my contribution. http://www.digg.com http://www.clixwlix.com http://www.fark.com http://www.propeller.com http://www.reddit.com Now you add remainings. But please donot duplicate. Thanks