I was recently flying PIT/MSP/SFO and was upg'd MSP/SFO at around the 3 day mark, but PIT/MSP - with ZERO F seats taken on the seat map - I wasn't upg'd til just a few hours before the flight - go figure! I never saw that happen til recenly and wonder if it could be some kind of DL influence.

On a side note, I can't seem to get the flyaow.com/classamex.htm website to work anymore. Am I doing something wrong? What other free sites are you using to check availability?