Marc Heusser a écrit :
I have not yet found good resources on Norway such as weather forecasts
(VHF, internet maps, ...), ports (websites with descriptions,
facilities, phone numbers, VHF channels) and descriptions of cruising up
there with a small motor vessel (15m).

Any pointers most welcome, as I plan a trip from Göteborg (SE) to Oslo
(NO) and Kristiansand (summertime).

Hi Marc!
Found this add:

http://www.norwegiancruisingguide.com
The original, most complete and most up-to-date English language guide
for mariners to the coasts of Norway, Svalbard (Spitsbergen), Bjørnøya
(Bear Island) and the SW coast of Sweden.
* Available now as an eBook for immediate download.
* Includes a harbours and anchorages waypoint file for loading in
to your plotter or navigation software.

Hope this help...
Rgds.
Michel.