A new report from Econsultancy suggests that email still beats social networks when it comes to e-commerce success. The report says that over a third (37%) of consumers don't use a social networking site, and that those who have become a "fan" or "friend" of a company or brand online are still in the minority. The report is based on a survey of over 1,400 U.S. consumers, which the firm calls "nationally representative.