Today I upgraded from the GNex to a Moto X. I was forced off my unlimited data as a result. I did sort of find a work-around that may be of interest to other people on Verizon, depending upon usage.
Previously I had 450 min with unlimited text and unlimited data, it cost me about $100 per month. I found a plan that is not listed on the website (this was through chatting with someone at Verizon) where you can get 300 min, 1000 texts, and 5gb of data for $95/month. After phone insurance I'm at about $104 or so, and even with unlimited data, I rarely went past 5gb.
If you're like me, and don't really use your phone to talk, and you're going to be forced off unlimited if you don't want to pay full price for a phone, you may want to look into this. It's a hell of a lot better than the price for 5gb per month that you'll find on their webpage. I don't think this data is shareable, but that didn't matter to me.
Also, there is a 30% discount for online orders if you use the code VERIZON30. No clue how long that is lasting for, however.