FCC chairman Julius Genachowski briefly mentioned data roaming at CTIA last week, but now he's telling Congress that action is inbound, to ensure rural carriers don't get left behind the rest of the cellular industry. You see, in 2007 the Commission mandated cheap roaming agreements for voice and messaging services to let regional carriers compete, but cellular data is the bee's knees now (as those of you reading this on a smartphone can attest) and those agreements won't protect the Tiny Tims of telecom in a world of VoLTE anyhow. So, as he