The company I work for held a webinar earlier this week and what was interesting to me as we analyzed the registration list was that 3 people heard about it through LinkedIn and 1 person heard about it after one of our employees posted it on her Facebook page.  The past couple of webinars have had traffic come from promotion on Twitter but I was excited to see that our success has now expanded to Facebook and LinkedIn.  I’ve been reading some articles by Jeremy Epstein addressing the growth of communication via social networks and how it’s impacting search engine optimization.  This is a prime example of that happening!