This is really embarrassing ...
I just checked in for AA 1861, BOS-DFW, en route to Seattle - and discovered, at the airport, that I had left my VIPOWs (upgrade certificates, for those not into AA jargon) at home.
(I even knew the guy who checked me in at the Boston AC, but there wasn't a thing he could do about it with the new system they have now.)
9F, here I come!