Wikipedia's list of Norwegian porn stars like Tanya Hansen and Vicky Vette. The list of Norge pornstars is not too long. Looks like Oslo XXX and Stavanger sex is more of a home made thing than public.
Each and every country has it's on porn productions. It's legal in many countries, but for some reason porn is more popular in countries where it is illegal like in Korea, the country with the biggest spenders for online pornography.