Google Analytics - Social Media Script

I require a script written for Google Analytics (probably as a Firefox plugin but I'm open to suggestions) which reports on the traffic coming from social media and bookmarking websites such as: Facebook Twitter Linkedin Youtube StumbleUpon Digg ...and about 20 others which I can list. There is a script available for Firefox as an extension of the Grease Monkey plug-in which allows you to track a few social bookmarking websites, but this doesn't work very well. You can read more about this script here: [login to view URL] Please come back to me with any questions Thanks Julian Hall