The keynote speaker at this past summer's TechReady conference—a gathering of 6,000 or so Microsoft engineers from around the world—was the company's chief software architect, Ray Ozzie. This was not a routine appearance. Ozzie arrived at Microsoft in 2005, and the following year he inherited the title of CSA directly from Bill Gates. He was now the microprocessor of the Microsoft machine. But he had never addressed the semiannual conclave. His explanation? He wanted to wait until he had something big to show the troops.

But there's something else: Ozzie hates speaking in public. His idea of paradise is pitching his vision around a table near a whiteboard, where he can proceed conversationally and draw on his marketplace savvy, quiet confidence, and ability to scrawl out XML code on the fly. Auditoriums are something else. "I have high anxiety—massive, huge, tremendous anxiety," he says. "It's not a natural act for me." The infrequency of his public appearances has triggered murmurs that the guy in Gates' chair is afraid to face his public, like some sort of software Greta Garbo. "Where's Ray?" Microsoft observers have been asking, as Google grabs more headlines and Apple relentlessly mocks the company's shortcomings. Two-plus years into the job, there is still a bit of mystery to Ray Ozzie