Social Bookmarking Communities - Digg - Digg.com - Everything on Digg — from news to videos to images — is submitted by their community. Once something is submitted, other
people see it and Digg what they like best. If your submission rocks
and receives enough Diggs, it is promoted to the front page for millions of their visitors to see.
- StumbleUpon - StumbleUpon uses
 /  ratings to form collaborative opinions on website quality. Collectively, positive ratings can drive significant traffic.
- Reddit - www.reddit.com - reddit is a source for what's new and popular online. vote on links
that you like or dislike and help decide what's popular, or submit your
own!
- etc
Tools for Social Bookmarking | 