Zynga launches CityVille for Facebook

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Zynga may be San Francisco's fasting growing company

FarmVille game development manager Guarav Agarwai works at one of Zynga's  Potrero Hill office spaces

Zynga appears to be the fastest-growing business in San Francisco, and ranks among the most rapidly expanding Internet companies in the world, reports James Temple in the San Francisco Chronicile. Read more

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