I find these errors to be fascinating. The internet now makes typographical errors into very serious problems. And, while the companies have been less than adept at dealing with these issues, what about the lack of ethics among those who book these rates, knowing they are errors, and then whine and complain about how they are treated?

[HINT: When do you "know" it is an errror? When you book it and don't feel good about calling the hotel/airline at that instant to say "Hey, I just found an amazing rate. Would you please check for me to find out if that is a mistake or a real promotional rate?"]