This is a good search motor for news in Norwegian about the Norwegian royals, it searches in all the national and local papers
Viddi Norge - finn den lokale søkemotoren for DITT hjemsted
It works best for Märtha and Mette-Marit as it is not so common names as forinstance Haakon, but it works for him aswell, its better to search for "Kong Harald" than just Harald which is a quite common name.