The long-rumored national mobile WiMAX partnership between Sprint and Clearwire is finally official, both companies said today. Sprint will own 51% of the new company, which will be called Clearwire. Google, Intel, Comcast, Time Warner Cable and Bright House Networks combined are investing $3.2 billion, based on a $20 estimated per-share price when Clearwire opens on the NASDAQ after the deal’s expected completion later this year. “We’ve made an excellent start developing XOHM WiMAX services. Contributing those advances to a strongly backed new company – in which we’ll hold the largest interest – provides Sprint with additional financial flexibility and...