Poland and Austria have already raised their voices, and Germany is now getting in on the protests against ACTA. There's a website called
http://www.stopp-acta.info/ (German and English), and it includes a wiki with dates for
demonstrations in all countries, plus some more information on how you can act.
And there is more: everyone can sign
this online petition, hosted by avaaz.org. Please click that link, sign the petition, and spread the word - we have to act quickly to have a chance at stopping ACTA!