PIT is largely a connection point, so none of that through traffic is affected. As for the locals, they are so invested in Dividend Miles, it will be hard to switch them. To really get in another carrier''s shorts, you either come on top of them with a full operation (like AirTran at ATL), or slice them up in non hub cities, where they still have an enhanced presence (in the case of USAirways: LGA, BOS, TPA, DCA, RDU, to name a few). Going after them in a smaller hub city, on a single spoke, won''t do much.