After two trials of WiBro services, conducted by KT and SKT in March and May of 2006 respectively, Korea's WiBro services went commercial on June 30, 2006. After running commercial WiBro services approximately one year, network coverage is still low and inadequate; WiBro lacks terminal devices and killer applications and has an unclear service positioning. These factors have hampered WiBro's initial development. This report will analyze the development of Korea's commercial WiBro services and the bottlenecks that have been encountered during initial stages.