Well, PSP-ORD-DCA was full when I got around to calling. But got PSP-LAX-IAD without an issue. Agent was quick and efficient: have to thank the good agents on the Premier line!
Also, check your flights: PSP-IAH got canceled sometime this afternoon, and the app didn't send me a notification. I only found out because TripIt decided to give me Pro functionality for this trip, and I got an email that it was canceled.