AT&T is the displaying the financial calculations of a company that has a monopoly. Why invest in systems capable of handling the known volumes when it is a temporary condition? Why really work to build out the network when a VZ-version of the iPhone will drop AT&T's traffic numbers by 50%? Why do anything but the minimum when the goal is profit? Is it really that hard to come to terms with the fact that AT&T knows where it stands and has chosen to act the way it is based solely on profit? Have you forgotten where AT&T came from?
Wake up people. Until Apple signs a deal with VZ, the addiction to the iPhone means the local "drug dealer" can treat you like dog food because you can't go anywhere else to satisfy your addiction.
AT&T is a bottom-line company. Network expansion and large web server farms cost money. Why spend it if there is no need? Simple, short-sited business decision. Until Apple sees an impact on sales, expect AT&T to do nothing that takes away from its bottom line. Apple is the tail wagging all of AT&T.
If you don't like it, find a local 12-step iPhone program.