Google Dropping Conservative Sites?

Is Google Dropping Conservative Sites They Disagree With? from Jennifer Laycock at Search Engine Guide is an interesting article regarding the possibility that Google is dropping sites from their index due to their political content. Jennifer has done some excellent digging around into some of the allegations surrounding the issue. However, the interesting, larger point is the extent to which Google (or indeed any other search engine) has a responsibility to be impartial in the information they provide, for financial reasons if no other.