In a move that is sure to surprise no one, it appears AT&T is getting ready to send its trusty 2G GSM network riding off into the sunset. MarketWatch is reporting that some Ma Bell customers have received letters, urging them to upgrade to a 3G or (gasp) 4G device and warning that service may degrade in some areas as spectrum is repurposed. While the letter stops short of saying the 2G network is being shut down, it seems the writing is on the wall. With the collapse of the T-Mobile
