A lot of this is also about Southwest and its lowfare rivals. While they (WN) have slowed market expansion, jetBlue and AirTran have increased their presence in Northeastern markets, where WN has felt it could come in anytime. These guys are already focusing on the next movie, which features them against each other. And they are no slouches, witness jetBlue trying to take advantage of AirTran equipment limitations, by offering transcon services out of ATL. In a nanosecond, AirTran wet leases some buses, and goodbye Blue. There are a lot of moving parts to this one, and not much to worry about with U, as they cut fares (and yield) at PHL, months before a WN tire ever hits the tarmac there.