The United States at least seems to think Norway is important econoff to have an active intelligence force on the ground. In 2010 it was revealed that the US Embassy had a special unit of 15-20 persons to do surveillance in Norway [0].

However as I understand it this "Surveillance Detection Unit" did not spy against the Norwegian state, but against more asymmetrical threats like islamists and other that feared could act on their own against the US. They did however operate in the same area (downtown Oslo).

1: http://www.newsinenglish.no/2010/11/08/still-no-answers-from...