Just to beat a dead horse (or at least a quiescent one) further:
AVweb published
this article on wrong airport airport landings and why pilots do them despite the data available. While it has a slightly general aviation bent (considering the audience for AVweb), it's a good insight into what happens -- lots of biases come into play.
AOPA relates
the tale of a 757 landing at the wrong airport in Arizona. While the story is a bit disturbing, the conclusion is that there aren't that many actual wrong-airport landings in the bigger picture of how many flights there are every day.