Peter Gervai introduced a fresh and unbiased view "from the outside", which is very interesting indeed!
Just to clarify a subtle point: The premise that there is no such thing as a single Norwegian language, would require a very narrow-minded definition of "language", I'm afraid.
Most Norwegians and most linguists would agree that there *is* a Norwegian language, but there are different (equally valid) ways of *writing down* this language. The written forms are not *dialects*, because one cannot tell from the way a Norwegian person *speaks*, which written form she prefers to use. That preference depends partly on her upbringing, partly on her own choice.
Ulf Lunde