Thank you. This confirms the report from post
282.
No longer a rumor. I called Priority Pass to confirm and they said that US Airways is pulling out of the system as of March 22. Amex customer service now says the same thing.
EDIT:
And now we have this in the latest email newsletter from Priority Pass:
Important notice!
As a result of the recently announced merger between American Airlines and US Airways, we have been informed by both lounge partners that they’ve unfortunately chosen to no longer participate in the Priority Pass lounge access program effective March 22, 2014. We are extremely disappointed to have to share this news with you, but you can be assured that we are committed to expanding our global network of participating lounges for your convenience.