The following excerpt is from an article provided by the New York Times to Yahoo Finance:
...So many people now dip their balance below zero that banks generated an estimated $20 billion from overdraft fees on debit purchases and A.T.M. transactions in 2009 according to Michael Moebs, an economist who advises banks and credit unions. All of this revenue is potentially at risk, since these are the two areas that the new Federal Reserve regulations cover. (Banks generate an extra $12 billion by covering checks and recurring bills; under the new rules, they can still cover those and charge fees without customers' consent.)..
There are growing reports among consumers about hundreds of dollars charged on small purchases. I guess $32 billion dollars is something to talk about.
New legislation passed help notify consumers, give them options, and put this bank revenue at risk. Read the complete article in the link below and if you have debit cards make sure you understand what your options are so that you can make wise decisions when you get all that mail from the bank telling you why they want you to think it is in your best interest to keep on paying these fees.