The first example, see below, is from Reagan National Airport (DCA).
The first problem involved scanning the QR code - it required climbing onto the baggage conveyor belt to get within 'snapshot distance' of the QR codes.... A first attempt failed though a second was successful. It turned out to be advertisements by American University in Washington, D.C., though the experience could have been improved by having the QR code resolve to a more mobile-friendly site...
The second example is from Hartsfield-Jackson International Airport in Atlanta, Georgia (ATL). Big Green Egg, a company selling "the Original American Designed Ceramic Cooker", had and advertisement with a QR code. It resolved to a MP4 video file that unfortunately could not be displayed on a Blackberry 9800 Torch. OK, so a clear fail, it clearly would have been better to use a format that would run on a wider range of smartphones...
And finally, some miscellaneous QR-related articles and news:
Who’s Really Scanning All Those QR Codes? [Infographic]
Tribeca Film Festival engages attendees via QR code initiative
Blog entries referencing QR codes:
QR codes in the wild (9 links)
BB QR readers (20 links)
QR- and Tag-related entries (19 links)