Thor and the Norse pantheon have always been a good fit with D&D. The Norse pantheon appeared in the classic 1st edition Deities and Demigods. Their domains were also covered in an article by Roger E. Moore titled Plane Facts on Gladsheim in Dragon Magazine #90. In that same issue he wrote a module set in the dangerous mountains of Jotunheim called Aesirhamar. I highly reccomend this issue for anyone wanting to run a planar quest in this genre.
The Mighty Thor comic is also a good resource for anyone wanting to run something in the plane of the Norse gods. Here is a couple great maps from the Thor Annual #10 of all the various worlds including Asgard, Jotunheim, Muspelheim and more found within the pages of Mighty Thor. Despite being set in modern times, Thor's fantastic background of monsters (Midgard Serpent, Frost Giants, Fenris Wolf, etc.) and magic (Norns, Loki, Enchantress, Lorlei, etc.) make any issue you pick up a possible inspiration for an adventure.
Even if you don't read comics, or use Norse gods and vikings in your game, at least go see the movie. Not only is it is an action packed spectacle to see, but you may even find something that works for your game. Enjoy!