@Lawcere you may want to make a list of petitions by country in your post
The basic petitions that you've already provided are really all that's out there right now; the protest against ACTA isn't very country-specific, so there aren't many petitions that would only gear toward Australians or Japanese. Instead the petitions give the option to select your country when you sign.
I've put them up on the front page along with some links to government information, as well as a petition against Lawful Access for other concerned Canadians.
Thanks for your help. If any of you find better links to stronger petitions or specific information, let me know!