01 July 2011 - Ability to specify the region where file should be processed

<query>
    <userid><<id>></userid> <!-- required-->
    <userkey><<key>></userkey> <!-- required-->
    <action>[Action]</action> <!-- required-->
    <region>[us-east-1|us-west-1]</region>
    <format>
        <!-- Format fields -->
    </format>
</query>

{
    "query": {
        "userid": "<<id>>",
        "userkey": "<<key>>",
        "action": "[Action]",
        "region": "[us-east-1|us-west-1]",
        "format": {}
    }
}