Did Ballmer Blow It With Carolyn Everson? (Updated)

That’s the question some are asking inside the software giant, which is finally coming to terms with last week’s news that Everson, Microsoft’s global ad sales leader, has jumped to Facebook after roughly nine months on the job.

Obviously, the opportunity to run global ad sales at Facebook—a company that has an opportunity to redefine an ad medium—is one that few in digital media would be able to turn down.