My understanding of viral marketing is something which is passed on from one user to another, hence the name 'viral'. For example a 'hot' ebook or YouTube video would 'go viral' if it was very popular and users started emailing it to each other, blogging about it, and posting it on MySpace etc. A truely viral marketing campaign starts quite small, and very quickly can reach a massive audience.
Bill
Um, from what your saying is that similar to backlinking?? I mean, if people knew about your website lets say youtube, and started writing about it and then having a link connecting to your website saying like "other relevant website
www.blabla.com" .. Is that a form of viral marketing too??