GPS in Norway
I took my GPS to Norway last October & the only coverage is that of the 'base map', in other words main roads & towns/cities......but it wasn't too bad....still need to take maps!!
Oslo is covered in much more detail.
When I contacted Garmin at the time they said there were no early plans to do detailed mapping of Norway, but I was referred to the Norewgian Garmin site (sorry, no URL) where non-Garmin/MapSource detailed mapping was available for download, at a charge, which was compatible with the Garmin/MapSource product.
I didn't use these downloads myself, as each one covered a fairly small area, and were quite expensive.....
I see that V5 of MapSource now covers all of Sweden, and would guess that with the continued proliferation of GPS in Europe, it's only a matter of time before Norway gets detailed mapping also.