Looks like AT&T isn't the only major carrier having issues with the guv'ment lately. Remember that 20MHz AWS spectrum that Verizon got from Cox Communications for a cool $315 million this month? How's about that juicy spectrum Big Red scored from Comcast, Time Warner and Bright House for $3.6 billion? Well, it turns out those deals are raising an eyebrow or two over at the Justice Department, which just launched an investigatio