"... the most common roadblock I see is overestimation of the competition ..." Such a profound observation of why competition is important. There is a problem

"... the most common roadblock I see is overestimation of the competition ..." Such a profound observation of why competition is important. There is a problem with competing in exactly the same space though. The pie slice I'm not so sure about. There is a strong correlation between Internet sites, and users which gives you an upper-bound on returns: Adermic, Huberman, "Zipf’s law and the Internet" ~ http://www.scribd.com/doc/3254689/Zipfs-law-and-the-Internet http://www.scribd.com/doc/3254689/Zipfs-law-and-the-Internet