comScore has just released it's finding on November 2009 traffic and reports that facebook has surpassed the 100 million unique visitors mark in the US alone. making it the fourth largest internet site. Below we have attached the image from comScore graph depicting this trend.

Facebook over the last year has more than doubled it's US audience. It would be interesting to note what changes their newly launched privacy policy will have on their ratings. Also the new integrating with Twitter in which user updates from Facebook will be published on Twitter