Motorola announced today that Ed Zander will be relinquishing the role of Chief Executive Officer in January 2008, a title he will have held for four years. Greg Brown, current President and Chief Operating Officer, will take over as CEO, while Zander will remain Chairman of the Board of Directors until at least May of next year. Zander, who came to Moto from Sun Microsystems, will perhaps best be remembered for overseeing the company during its RAZR-led handset revival.