The term "3G" proclaims the next revolution in wireless technology. It refers to the much-ballyhooed third generation cellular network services, currently available in the United States from Verizon, Sprint and Cingular. But after all the hype, is 3G living up to its broadband promise? Cellular wireless networks were originally created for voice-only communications. As their popularity grew, cellular network providers began to piggyback data on their networks. At first, this was great for simple text messages, but the masses soon clamored for full-blown Internet and e-mail access. Voice communications over cellular wireless networks has remained somewhat constant over the years...