Delicious is a social bookmarking system, that is notable, not only for its unusual web address http://del.icio.us, but for its unusual approach to content building that is becoming increasingly popular. In order to ease the burden of producing consistent stream of fresh content, publishers are turning to users to build, categorize and qualify content. While this is said to be part of the web 2.0 phenomenon, publishers realize the value of collaboration.
Social bookmarking allows users to qualify content. With Delicious, each "bookmark" of a specific webpage is seen as a vote of confidence. The more people who bookmark a specific webpage, the more credible the webpage is viewed.
Today, no one can deny the importance of backlinks in Search Engine Optimization, especially in Google Optimization. In this article, you can find some solutions for the goal of 50 backlinks with PageRank greater than 2 for new websites. When this goal is archived, I'm totally sure that the pagerank of your website will be boosted to at least 3 in the next update of Google.