I flew LGA-MSP on the 14th...missed the upgrade but did get handed the green shamrock cookie thing as I boarded. Looked like they were only being handed out to elites. IIRC the same cookies were for sale for $4 in World Bean.
I flew the ANC-MSP redeye on the 16th but didn't hear any announcements about freebie headphones. Not that it made any difference since I got the upgrade. But for those in coach it would have been a waste anyway, because the IFE crapped out not long after take-off.