Does the 'Stop Online Piracy Act' go too far?

The Stop Online Piracy Act (SOPA) under consideration in the US House of Representatives aims to crack down on online circulation of pirated American movies, music or other goods by forcing Internet companies to block access to foreign sites offering material that violates US copyright laws. Supporters of the bill say it protects the intellectual property market and corresponding industry but critics say it would enable internet censorship and threaten free speech. What do you think?