I think this is a great idea but would go a step further and include every major region/country rather than just the EU and US.

A group of international servers cross referencing indexed webpages for possible censorship would be a powerful tool. It could rank each region on their applied censorship laws in regards to the internet while providing a means of presenting the information that is censored. For it to be successful though, it would have to work 'out of the box' internationally.