SAN ANTONIO, TX - AT&T will cast a wider net for mobile customers this year by building out its network to make catching a high speed wireless web connection easier coast-to-coast. The big telco today announced highlights of the company's 2008 wireless network expansion plans, including the deployment of third-generation (3G) wireless broadband service to more than 80 additional cities in the United States through the course of the year. The planned expansion is expected to deliver GSM provider AT&T 3G services to nearly 350 leading U.S. markets by the end of 2008, including all of the top 100 U.S....