97th Floor, a US-based SEO firm, have recently released what they call their “Social Media” extension for Firefox, which adds a new toolbar to the bottom of your browser window for fast posting of URLs to Digg, Reddit, StumbleUpon and del.icio.us. The toolbar can also display stats if a page has already been submitted to some of these social bookmarking services.
What makes this extension interesting is that when browsing one of the aforementioned sites, icons beside each story title will show how popular the story is on each of the other three sites. You can then post the URL to any of the other sites with a low or zero rating and thereby boost your account towards “power user” status. The screenshot shows some examples of the embedded icons and remote ratings for each article on various sites.