In reply to Brendan:
In the hanshelleren cave there's a few trad-climbs, ranging from N6- to N8+, but nothing really hard-core. There are a lot of cracks but they are a bit discontinous, but surely it's possible to do some really hard and a bit run-out trad-routes.
In Ethan Pringles blog there are some pictures of Sindre Sæther on-sighting the hardest trad-route in the cave (
http://www.ethanpringle.com/2012/07/01/flatanger/ ).
There are more trad-climbs in the area of good quality. This is pictures (by Jonas Wiklund) of me trad-climbing at a crag a short walk from the cave (
http://www.flickr.com/photos/wiklund/2577600442/ ,
http://www.flickr.com/photos/wiklund/2575468380/ ).
The area is really worth a visit!