For years, CIOs have been fighting the stereotype that they're weak communicators, unable to speak the language of business or relate to anyone outside of IT. But by using practiced communication skills, many CIOs are proving how convincing, credible and captivating they can be-in the boardroom and on the Web. (For evidence, check out blogs by British Telecom's JP Rangaswami, Beth Israel Deaconness Medical Center CIO John Halamka and Mike Schaffner, the director of IT for Cameron International's valves and measurement group.)