DSLReports has a tip that Sprint will launch its WiMax service in its first commercially available market on 6-Oct-2008: The site for the service should go live on 26-Sept, allowing sign ups. Pricing will likely be sub-$50. Speeds will likely be advertised as 2 to 4 Mbps with higher bursts. Long-time market watcher Karl Bode writes that backhaul issues appear to be sorted out, with Sprint having signed a number of new deals to ensure that their high-bandwidth WiMax sites can be fed with enough bites.
Baltimore is one of what I believe are still three test markets that will go into commercial availability, albeit as much as a year after initial plans, and then months delayed after revised plans were announced. Still 2 to 4 Mbps is far above the level that current cell technology can achieve as a consistent range.