i've put up several links in the past few months here http://barfwars.com/ and am already seeing good PR increases. Anyone have any other sites?
Here is a list of social bookmarking sites> http://marketing-a-website.blogspot.com/2009/05/top-55-social-bookmarking-websites.html that are pretty close to the same as that site. Thanks for the site though.
But most of the social bookmarking sites have enabled the no follow attributes wherein you can't get the PR juice, especially when you are too much obsessed with PR. If you are content with traffic from these no follow social bookmarking sites, there is another problem because the traffic is not targeted. So, play safe