Google’s official policy on censoring and otherwise altering search results has been updated since their decision to provide censored results for China. The policy can be found at the help page for the question “Does Google censor search results?”
The previous policy read:
Google does not censor results for any search term. The order and content of our results are completely automated; we do not manipulate our search results by hand. We believe strongly in allowing the democracy of the web to determine the inclusion and ranking of sites in our search results. To learn more about Google’s search technology, please visit http://www.google.com/technology/index.html
The updated policy now states:
It is Google’s policy not to censor search results. However, in response to local laws, regulations, or policies, we may do so. When we remove search results for these reasons, we display a notice on our search results pages. Please note: For some older removals (before March 2005), we may not show a notice at this time.
[via Search Engine Watch]