Is Microsoft Plotting A Yelp Competitor Named Postbox?

Earlier this year, Bloomberg BusinessWeek reported that Microsoft, not just Google, made a serious attempt to acquire business directory and reviews site Yelp. According to "two people involved in the negotiations", the Redmond software giant even bid as high as $700 million for the company. Yelp instead opted to remain independent, for better or worse. Google is attacking it with Places and Hotpot. And now some information has surfaced that indicates Microsoft could be planning a Yelp rival as well.

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