I would like to return my WiFi only model for the LTE but I can't. I simply will not allow ATT (or Verizon) to get any more of my money when I have already paid for data I don't use on my iPhone.
Yes, I am cutting off the proverbial nose to spite my face but this is now a matter of principal.
For those of you who JB - good for you, but again I can't do that in good conscience. Hopefully I'll get over that soon. 
For those of you who think that ATT (or any other cell company) will move to a more customer oreinted data plan in the future I've just got to say - YOU'RE DREAMING. ATT and Verizon make millions off of other people's inovations (Apple, Android, etc) and other people's unchecked desire (that would be you, the customer). They have no incentive to change their model.
There are only two ways customers will get unlimited, cheap, fast data: the government steps in and makes it a national priority for nationwide broadband wireless access or a new company steps in with new technology.
Even with new technology one would have to think the cellualr companies would either buy up the upstart and then judiously dole out the new tech while keeping the price artifically inflated (i.e., recording companies and CDs) or if the said new company has some backbone and goes it alone then the big boys will do whatever they can to crush it.
Anyway, I'll go WiFi for now and intentially cripple my wonderful new device.