The United States government has asked some popular search engines to hand over one million random web addresses and search queries performed in a one week period. Companies like AOL, Microsoft and Yahoo have all agreed to the request, but Google is putting up a fight.
Google doesn't see the logic in this request and have refused to disclose the information. The government says they need this data to measure pornography being served for queries children perform.
This fight has left Google in a legal battle that is sure to have an interesting outcome. Gary Price from Search Engine Watch has a great commentary on the situation with actual legal documents related to the case.