Viral sites are 10% original idea, 10% correct marketing and 80% luck. For every viral site you see there are hundreds of failed attempts. Facebook is very different than myspace, but facebooks use eclipsed myspace's. It is partly due to good execution, but a lot of it was plain old luck (which in reality is a fluctuation of random distrobution at the right time).

Who will dethrone facebook? One of the many who are trying. I see it as chasing rainbows, but thats just me.

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