The Norway Post is putting together information about genealogy resources for those of Norwegian ancestry. You can access it here at norwaypost.no. Some of the sites they’ve collected include:
The House of Emigrants
The National Archives of Norway
Passenger Ships and Emmigrant Lists (a very neat site)
The Norwegian-American Historical Assocation
Norwegian Name Statistics
If you have resources they don’t have listed on the page above, they would like you to contact them.