There's a great post over at TechCrunch on the rankings of social media sites comparing October 2007 with October 2006. You'll notice the huge jump by Facebook which was made available to the general public in May of this year. There are some interesting sites that have experienced explosive growth over the past year.
Thanks to comScore for the following data.
Labels: social mehttp://www.blogger.com/img/gl.align.center.gifdia marketing, Social Networks