From Tokyo to Helsinki, Manhattan to Manila, Howard Rheingold takes us on a journey around the world for a preview of the next techno-cultural shift-a shift he predicts will be as dramatic as the widespread adoption of the PC in the 1980s and the Internet in the 1990s. The coming wave, says Rheingold, is the result of super-efficient mobile communications-cellular phones, personal digital assistants, and wireless-paging and Internet-access devices...