IndustryGamers reports Zynga’s new Facebook game, CastleVille, is breaking the publisher’s own records for rapid growth. In just five days, Castleville has drawn 5 million users, as compared to CityVille’s 3.2 million over the same period.
Zynga is expected to make its initial public offering over the next few weeks, and is looking to command at least $1 billion.
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