I'm on the sidelines, not yet being ATT customer, but have * existing customers* received notification?

The "news" on ATT is TLDR, to figure out all parameters, but note that the Apple store (http://store.apple.com/us/browse/home/shop_ipad/family/ipad) still shows old rates. Wonder what happens if I buy iPad from Apple when site gives old rate... what leverage would I have against rate increases. Anyone yet read details on the plan they signed up for - regarding changes?