US Air delivered my bag tonight at about 10:30pm. They offer no way to check on the status other than their website for request, which I sent requests to 3 times:
Try #1 response:

Thank you for contacting US Airways about your baggage. We apologize that you have been without your luggage and we thank you for your patience. We have checked your file record and see that your luggage has arrived and scheduled for delivery.

The service handling your luggage normally delivers within 4 to 6 hours, however due to a larger volume of bags scheduled for delivery today, that window may be extended.

Try #2 response:

nothing

Try #3 response:

Thank you for contacting US Airways about your baggage. We apologize for any inconvenience you may have experienced.

At this time, we are unable to respond to your e-mail. Please contact the Passenger Baggage Call Center at 1-800-371-4771 for further assistance.

We appreciate your continued support of US Airways.

And 54 hours after my arrival, my bag was delivered to my door. Note that the 800 number they provide does not allow you to speak to a person, and does not allow you to be put on hold and wait for a person, they simply disconnect you. So really there is no way to check the status of your bag. This has be be the worst customer support i've ever experienced.

I suggest others, and i know there were a lot of others, who experienced this, to write and ask for your money from US Air.