Editor’s Note: This article originally appeared in the Oct. 2 issue of FS sister publication eM+C’s weekly e-letter, eM+C Weekly. To subscribe, click here. Social networking sites have become virtual “town halls” for people to aggregate, communicate and share ideas with one another. These sites are also growing in numbers. Wikipedia says there are 111 recognized SN sites such as MySpace, orkut, Facebook, hi5 and Blogger. Mashable, the influential social media blog, acknowledges more than 350 sites. Many have been extremely successful in attracting membership and raising venture capital, and even sold for millions to billions of dollars. SN sites are a key ingredient

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