The viral marketing just like the spreading of virus.Swing Flu (H1N1) is a good example, the infected person may infect the others and create the impact.Viral marketing is one of the promotional strategies that through the videos, social networks (e.g. facebook, youtube) to attract the attention of the audience and send the advertising message to the others or even create a buzz amoung them.The viral marketing can summerize as the following 6 elements: Gives away products or services Provides for effortless transfer to others Scales easily from small to very large Exploits common motivations and behaviors Utilizes existing communication networks Takes advantage of others' resourcesOur blog have much posts concerning the viral marketng. Let share with us!http://viralmarketer2009.blogspot.com/