The F.C.C. will now investigate this large-scale, multi-million dollar sale to Kabletown. And now, the$5.6 billion question: Who will take the reins of the cable giant's new acquisition? According to my sources, the clear frontrunner current G.E. executive, Jack Donaghy. The people I'm talking to say he's the only guy out there with the programming experience, business savvy, and piercing, blue eyes of a Siberian husky that the job requires. I'm told Donaghy was instrumental in making this deal happen. And I spoke to him earlier. He refused to speculate, but did say, and I'm quoting here, ''I'm going to celebrate by buying my lady friend ''that necklace she pointed out and then, cooking her a Western omelette,'' end quote.