The Chinese government has been rather successful in its suppression of freedoms most thought were integral to the internet.
Google, Yahoo and MSN have all agreed to censor search results.
And now Amnesty International is calling on the engines to help fight Chinese oppression. A recent BBC story details the call for help.
Personally I think they should answer with a resounding "YES". Time to live up to the moto there Larry and Sergei - Do No Evil - that is not limited to the United States - your success is global!