We're continuing to press the matter of Air America's $480,000 in (possibly unreturned) taxpayer funds obtained in a highly questionable manner. Meanwhile, more ratings releases today shed a great deal of light on the network's future. Unlike its conservative counterpart, liberal talk is destined to be simply a regional, niche format that works in a few cities and fails elsewhere. That's become clear. While right-leaning talk also appeals to a segment of the population, it's big (even with recent ratings troubles) and successful nationwide, almost without geographic exception. Ratings released today for Seattle, Portland and Denver put the finishing touches...