Chatter “makes our core product better,” says Marc Benioff, Salesforce.com’s voluble chairman and chief executive, who adds that e-mail traffic at Salesforce has fallen 40 percent since his employees started Chattering in June. “You can see which employees are adding value to your business.” He says he uses the software to keep an eye on big deals and see which of his support reps are best at squelching problems.

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