I found this article from Search Engine Land, and had to repost it here.
In all the talk about SEO, this is hardcore evidence that SOCIAL MATTERS!! If you type the name of your company into a search engine does your company dominate the first page? I dont just mean does your website show up. I mean does your website hold a few spots, along with twitter, YouTube, Facebook, linkedin, Google+ and any other social site your on. I understand that your company name may not be searched alot, but if I’m a prospective client I will probably do a search for your company. I’m looking for reviews, and anything else about you.
Social media matters in SEO.