New challenge

Once you reach the pinnacle of corporate investor relations, there's nowhere to go but up and, in some cases, across the hall. After heading Microsoft's investor relations program for over five years, Carla Lewis decided it was time for a new challenge. So she joined the company's Xbox group. As general manager, Lewis is now focused on building an infrastructure to support Microsoft's Games/Xbox division. 'We're in transition from the entrepreneurial phase of creating a new business to the