This shows the US to have very little to no censorship.
http://en.wikipedia.org/wiki/File:Internet_Censorship_World_Map.svg
http://en.wikipedia.org/wiki/Internet_censorship_by_country
"Through 2010 the OpenNet Initiative had documented Internet filtering by governments in over forty countries worldwide.[6] The level of filtering was classified in 26 countries in 2007 and in 25 countries in 2009. Of the 41 separate countries classified in these two years, seven were found to
show no evidence of filtering (Egypt, France, Germany, India, the Ukraine, the United Kingdom, and the
United States)"
Do you, by chance, have the link showing filters from the United States? I have not been so trusting of our government in light of the events the last 6 month or so.