I'm traveling to Norway later this month.
will be in Oslo. can anyone suggest agencies, providers or otherwise provide tips and information?

...Brunhilde really hits the high note.

Seriously, you can try posting on the FKK Clubs board.  It's mostly about Germany but there are also some guys familiar with Europe generally.

http://www.en.realescort.eu/

You can visit the forum at sexwork.net which is scandinavian, for more info. I don't know of any scandinavian girls personally who use agencies. Most are independent. If you were to take a trip to Denmark, its legal both ways and Copenhagen is full of stripclubs with "menu's". Not sure about the rest of scandinavia though.Sweden, I know, has no agencies as its legal to provide but not to buy, so the girls are independently advertising. Oslo isnt all that far away from the border in case you were curious about popping over there