Facebook is one of the most popular social networks around. Millions of people are active on the site and contributing to it on a daily basis. By adding the Facebook Like button to your website, you not only encourage your visitors to give you some love but get to track which of your posts are getting more attention from your readers. With the Facebook Like Ranking installed on your site, you will be able to rank your posts by the # of Likes.
You can change the behavior of the plugin from its settings page. The update frequency and number of posts can be changed. Webmasters could use the get_like_ranking function to add Facebook rankings to their template. This particular plugin may not be perfect but the idea does have potential.[via]