In what can be interpreted as an attempt to stanch a possibly hemorrhagic flow of customers flocking to the Verizon iPhone, AT&T has added an extra 2 GB per month to its phone tethering plan for the same US$20/month rate as the previous plan, which came with no extra data at all.
Note that AT&T's press release (and Engadget's coverage) doesn't specifically mention the iPhone getting access to this increased tethering cap, and the HTC Inspire 4G is getting first crack at the new plan starting February 13. However, if AT&T doesn't eventually give its iPhone customers the extra capacity in addition to its other smartph
