Sprint Nextel awarded Motorola the Chicago market for the buildout of its WiMAX wireless broadband service. Motorola will deploy a WiMAX infrastructure to at least 1000 sites in the greater Chicagoland area, with select area coverage for Sprint Nextel’s existing EV-DO network, according to the company. Initial service is expected to begin in late 2007, with the commercial launch set for the first half of 2008. Motorola also is participating in WiMAX equipment and software trials at Sprint Nextel’s Herndon, Va.-based 4G laboratory.