[eschwartz]

1. In theory, yes. In practice, this plugin subclasses the builtin Amazon metadata source provider, which doesn't include Australia. Any support would have to be added there, at which point this plugin would automatically gain support.
   Kovid will probably be willing to add that if you ask him nicely.
2. Again, this is something you probably want supported directly in the main Amazon metadata source plugin. I think people are mostly using this plugin as a workaround, in order to return results for both and then choose whichever one they actually want.