Prone to bouts of buyer's remorse? Well if you were planning an AT&T flavored purchase, you might want to start the car. A tipster has sent in what appears to be a notice to staff advising that the returns period for equipment and service cancellations will be shrinking from 30- to 14-days -- effective tomorrow. Purchases made today would benefit from the longer period, and our tipster claims that there may be a grace period until November where returns could be processed as if still under the original scheme (what sounds, to us, like a courtesy for those who didn't read the fine print). We don't have all the fine print, but head past th