Filed under: WirelessSprint CEO Dan Hesse spoke at NXTcomm08 today, and he let it slip that Sprint is planning on launching its first commerically-available WiMAX network in Baltimore in September, and expanding the trial service currently operating in Chicago and DC by the end of the year. We're assuming that means Clearwire and not Sprint itself, of course, but Hesse also touched on the carrier's WiMAX-based 4G strategy, saying that consumers "can't seem to get enough data" and that devices like digital cameras and GPS systems will eventually connec