Just to clarify: the ACTA provides an international legal framework for dealing with intellectual property rights (IPR) violations. It is not a document about censorship in any way. As of today's date, it is still just a draft.
Overall, I think the ACTA is good news for companies across all industries, especially for the entertainment and technology sectors, as those two are hit the hardest with IPR violations.
What I'm not too fond of is how internet service providers could be held even more accountable for online IPR violations. If the ACTA were to require governments to heavily pressure ISP through public policies, then ISP would be forced to encroach on personal privacy for the sake of monitoring IPR violations. This section is still one that's undergoing heavy revision however, so we don't know to what extent the ACTA will involve the ISP.
For those interested in reading the exact text, it's section 4 of the
current draft.