With most American mobile data networks busy trying to deliver third-generation (3G) mobile wireless access to traveling businesspeople, Sprint’s newly launched Xohm service takes a giant step forward by offering America’s first 4G system.Based on WiMax technology, it can deliver broadband data speeds to notebooks, Internet tablets and eventually smartphones. But at the moment, there aren’t many devices to connect with, the network is struggling with reliability issues, and the high-speed service is limited to just one city — Baltimore.To read this Computerworld article in full, click here.