Condé Nast Portfolio Sept 11, 2008:

Yammer, which has been described as Twitter with a business model has won the top prize at the TechCrunch50 start-up conference.

Some 10,000 people and 2,000 organizations signed up for the service when it launched on Monday, according to TechCrunch. Conference organizers Michael Arrington and Jason Calacanis awarded Yammer $50,000 for taking the top spot at the conference.

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