Outside U.S. Data Limited on Kindle 3G - Fired for Tethering/Abuse?

Early Kindle eReader models come with unlimited 3G data access from Sprint which was taken over by an AT&T contract.  Kindle users were able to get 3G data access outside of the United States until July 1.

Kindle 3G users have reported that they are receiving warning messages that they will no longer be able to browse the internet with 3G data connectivity from other countries, including Canada.  As of July 1st Kindle Keyboard 3G web browsing is limited to 50 MB per month in some areas outside the United States.

Web browsing was described as an "experimental" service which could be withdrawn at any time. It appears in the menu under "Experimental."

Apparently some smart users had figured ways to tether the free Kindle data access to laptop computers. Others used their 3G in other countries when they couldn't get other data connections.