Officially, the FAA considers the airlines to be merged when they are operating under one single operating certificate. Until then, we are two airlines using the same websites, advertising, and paint jobs. Until we have one certificate AWA can't fly USAirways planes or routes, mix pilots or flight attendants, or have their mechanics do major work on the other's planes (and vice versa for US). And according to the transition agreements between the two pilot groups and the airline, the airlines can not go to one certificate until the pilots have a single seniority list and single contract to cover them all. In addition to all this, there has to be a single FAA approved training program, and updated manuals and procedures for all personnell in place before they will grant that single operating certificate - a huge task in itself.
All this should (we hope) be accomplished by spring of 2007.
One smooth landing is skill. Two in a row is luck. Three in a row and someone is lying.