Paying for data overage is the new hotness in the wireless biz, and Verizon was the latest to dive head-first into the nasty world of usage-based pricing for its wireless data plans just a few weeks ago. But how about paying for speed instead? Seems both outgoing Verizon CEO Ivan Seidenberg and CFO Fran Shammo commented today that the company's shiny new LTE network could support charging different rates depending on the speed subscribers select -- just like in the landline internet business -- though they wouldn't commit to implementing such a system just ye