I see the Java Warehouse is now open to a few more countries: Australia, Brazil, China, India, Russia, Sweden, and the United Kingdom. Although, unlike U.S. residents, developers can only submit free applications to be downloaded through the Java Store. They also won't incur the $50 annual membership fee until they are able to submit paid for applications. You can find the full access details (and the reasons behind the country restrictions) at the Java Warehouse Developer Center. Access to the Java Store is still only open to U.S. residents.
The Java Warehouse and Java Store are currently working as a beta release. If you're in one of the selected countries and are having problems, check the release notes for known issues and workarounds.