These new tiered pricing plans are for new lines of service only. Existing customers with an unlimited data can keep the plan even when they upgrade or renew. All you have to do is sign up for an unlimited plan before July 7th to be grandfathered in.
In a letter to its indirect retailers, Verizon pleads with its sales reps to "PLEASE, PLEASE make sure we take advantage of this heads up and get our heavy data users set up on these unlimited plans before they change." You heard the man, get yourself down to Verizon Wireless now and grab that $30 unlimited data plan before it's gone for good. [Android Central]