Yesterday in one of our website traffic workshops I was asked the value of links from Twitter and Facebook from a SEO perspective. This is an interesting question and I found a video that Matt Cutts from Google describing how Google works out the value of links coming from Twitter and Facebook.
Matt Cutts from Google has recently posted a video describing how Google works out the value of links coming from Twitter and Facebook. According to Matt, Google treat links from Facebook and Twitter in a similar way to other links. The video is only a few minutes long and will give you a solid answer.