Yeah, AT&T hasn't done that yet. Its a pretty dick move on Verizon to force people off their grandfathered plans. I have a 12 year old plan from cingular before AT&T bought them. So its dirt cheap for what I'm paying
Hopefully it'll last for you. I've seen some new cell phone providers that have unlimited plans in some locations but actually use powerful secure wifi connections throughout a city instead of using Mobile data. I wonder if the major companies will start doing that soon.