Why would any one want to cancel their AMEX card? They have been reducing credit limits as if the sky is falling - they are targeting people who shop in certain areas, some of us can't even buy delta tickets on our Delta AMEX cards because the credit limits have been drastically reduced that we won't even be able reach the awards thresh hold!
Here is an interesting video about an AMEX customer named Kevin D. Johnson:
http://www.youtube.com/watch?v=EhBmVaz8ttY
Kevin Johnson got so upset that he set up a website to find out what exactly is AMEX doing:
http://www.newcreditrules.com/