Delta and United are trying to out-pamper business class flyers

Thanks to the plethora of mergers in the airline industry -- a bankruptcy judge just last week cleared the marriage of US Airways and American Airlines -- things aren't looking good for the hoi polloi. As a recent Slate article pointed out, the era of cheap airfare is pretty much over, with four major airlines controlling 70% of the U.S. aviation market. With the economy-class market locked up with fewer service and fare options, the lucrative premium-class customer is getting more marketing attention. That segment, according to a United spokesman, provides a "disproportionate share of total revenue." At Delta, for example, the top 5% of passengers account for 26