I've just published a case study of the most amazing “offline" application of viral marketing. It's about an education and training organization that has perfected viral marketing in the real world world. Landmark has no outbound sales staff and relies purely on word of mouth to sell their courses (2.4 million world wide). The article examines 6 steps for creating viral content and how those steps are being applied by that organization. Here is the link: http://amstadd.com/offline-viral-marketing I'm not affiliated with Landmark. I just thought that some people here might be interesting in reading this case study.