http://www.evdoinfo.com/content/view/2154/64/
For some heavy EVDO users, Verizon Wireless has always been a challenge. First Verizon sold "unlimited data", but they actually terminated you if you went over 5gb. Verizon got slapped on the wrist by the State of New York for this. Now, Verizon is changing their terms of service. If you go over 5GB, Verizon Wireless MAY throttle back your speeds to 200Kbps (or slower). Here is the text from the latest EVDO Terms of Service:
If usage exceeds 5 GB per line during any billing period, we reserve the right to reduce throughput speeds of any application that would otherwise exceed such speed to a maximum of approximately 200 Kbps. These speeds are subject to change, in our reasonable discretion, in order to address network issues