When Yammer CEO David Sacks unveiled Yammer Communities on Feb. 25, he opened a new door for companies interested in using Twitter-like status updates to communicate with customers and partners. A free service, with the potential for additional security features, Yammer Communities lets users who don’t share the same e-mail domain communicate securely. Available March 1, the offering could help Yammer gain more traction as it seeks to compete with Socialtext, Socialcast and others that offer enterprise microblogging. See a tour of Yammer Communities here.
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