Ditto - file a complaint.....

From the contract of carriage:

If a customer with a seat assignment on US Airways does not obtain a boarding pass at least 30 minutes (45 minutes international) before the scheduled departure time, the customer’s seat assignment (including those seat assignments on continuing or returning flights) may be subject to cancellation. This policy does not apply to US Airways Shuttle flights.

Passengers departing ATL/DEN/DFW/HNL/IAD/LAS/OGG/PHL/PIT/SEA must present themselves at the US Airways ticket counter no later than 45 minutes prior to departure. Passengers failing to comply will be re-accommodated on the next available US Airways flight.

Jim