Actually Att has been doing this for a little over a year, but has been more common as of yet. Also it's not only to iPhone users but smart phone users period. They will add it on there own if you don't take action. When you signed your two year contract it stats that any phone you put your sim card in your to obide to that phones terms and conditions therefore by putting your sim in an iPhone you accepted the terms of a mandatory data plan. They do take awhile to find out but once they do they will surely apply it. Also no Att doesn't care that it's jailbroken unless your using their services in a matter in which they don't approve like using the my wi app. Give the reps at Att better credit a lot of them are very good with tech and know their products. It's the old Cingular employees that don't know any better
i dunno how true this is or not....its a rumor, but...
after sept 14, they going to start charging for the plan without your consent..
again, i dunno if its true or not....