went to a verizon store with her today, figured id post an update.
The clerk said that they couldnt do anything yet since in their system she would only be able to see her current account (a blackberry with unlimitted plan).
But also said that since she is just upgrading the phone on her account there is really no reason that anything about her plan should change, including her grandfathered unlimited plan. She also said that when she gets the phone, if there is any change on her plan that she should come back and they would straighten it out for her.
I get the feeling there will be a change since she chose the 2gb option but we'll see.