I’ve been hearing rumors of the verizon limit for some time now, and I finally found some threads and proof that Verizon is cutting people off if they go past 5gb using EVDO. Robert Cringley writes about his experience here, and I also found a thread where a user points out that the 5gb limit is stated in a cell phone brochure. Now, I dont remember seeing anything like that documented when I got my PCMCIA card, but I guess I havent gone over the limit yet.
This reminds me of the @home unlimited broadband fiasco a few years ago. Same type of thing, they advertise unlimited access, and I think people were getting letters if they exceeded 500gb of usage / month. I will not claim how many of those letters I recieved ;)