Yeah I also read existing owners can keep the unlimited. I know I use more now, cuz I haven't had mine for 15 months yet, but already have used 30 gb. That's more than 2 gb per month. Costs>savings
I think AT&T is still trying to sort the stuff out.
Meanwhile, I'm still pissed that Data doesn't cover txting. After all, a txt is usually less than a kb, it seems. Like 155 characters.