Months after Verizon, Verizon CEO Ivan Seidenberg said that it'll introduce the new plans in four to six months, according to the Wall Street Journal. This comes in the wake of its burgeoning LTE implementation, though we don't yet know if this will affect the current 3G CDMA network. Seidenberg was careful to note that the company is not just copying AT&T, which also moved to tiered data pricing earlier this year.
Interestingly, Verizon also indicated that the move to 4G would hopefully move suppliers like Apple to build handsets for it. He declined to comment on the Verizon iPhone speculation, however, stating that he "can't speak for Apple."
(Via Wall Street Journal)