The high-level manager who leaked this on the web said that roughly 80 percent of Microsoft's employees have an MP3 player. This makes about 16,000 iPod users among the 25,000 workers at Microsoft's Redmond campus.
How "stealth" varies from division to division. At the company's Macintosh Business Unit, which publishes a wide range of software for the Mac, owning an iPod is almost de rigueur.More details at Wired
But at the Windows Digital Media Group, which is charged with software for portable players and the WMA format, using an iPod is not a good career move.