Thanks for the heads up MotionMan. When you post, I read. =)
I've only read yours, Zenmervolt and a few other quoted posts. So forgive me if this has been posted before.
Regarding the entering of your zipcode on a gas purchase transaction at the pump, I'd like to caution those entering a zipcode not associated with the billing address on the credit card used.
The city I live in incorporated themselves to separate themselves from another town. Therefore they successfully received a new zipcode. As an example, the zip was changed from 90001 to 90003.
At the gas pump, I punched in the old zip, the fuel transaction went through ok, but the next day when I tried to buy a few items at a grocery store, I was told that my card was "on hold" and that I should call my banks customer service number.
Just a small warning about using an incorrect or bogus zipcode.