Oh dear. Here we go. City workers are banned from traveling to Arizona for official work. SF Gate reports: "San Francisco Mayor Gavin Newsom announced today a moratorium on official city travel to Arizona after the state enacted a controversial new immigration law that directs local police to arrest those suspected of being in the country illegally." Unless, among other exceptions, law enforcement needs to travel to AZ for crime investigation. Oh, and this rule goes into effect immediately. [via SFGate]