Just saw this yesterday. The odd thing is when I googled this - I saw a story dating back to Feb so Im not sure if this is the same scenario or if its happening again?!?!?
I would like to keep and eye on this because my wife has an iphone with AT&T and has been charged for exceeding her 2GB monthly plan despite minimal net usage.
i was thinking about this a few months back, unlike a computer you cannot see how many bytes or Kb of data u have sent/recieved on a phone (at least to my knowlege) so for the average joe there is no way to say "hey! i never used that much data!"
They should make that info available on the phone!