New Clause added on December 11, 2006:
4. Limitations on Your Use of the Service.
A. You may only access the Service from within the territorial boundaries of the United States, Canada, Australia, New Zealand or Singapore. Any access to your Account, whether by you or anyone else, from any location outside those countries is a breach of this Agreement.
They enforce this rule by tracking your IP address and unless your ISP has a US based domain/IP address you risk getting banned. If you are in the US military, they usually have special IP addresses that indicates them as being from the US military no matter where you are physically located in the world so you're safe there. However, don't use any other local ISP or risk getting banned.
That's pretty sucky on their part.
I guess that takes care of that. :(