Weiss and Hickman are still writing? And they are still writing about dragons?
Stick with what you know I guess.
Norse do crop up from time to time in WFB. I know that one of the Regiments of Renown or Dogs of War was a Norse unit. I dont think GW ever did a full army for it. (though I could be wrong).
#Edit# - Looks like GW made quite a few metal infantry for the Norse. You can find them here:
http://zachary.org/games/whcatalog.php in the Empire section. And I found that through typing Warhammer Norse into google.

It's easy to do.
There is a fan made PDF kicking around somewhere.
Ah... here it is:
http://www.scribd.com/doc/34396670/Warh ... mies-NorseAnd Gripping Beast do some awesome plastic vikings, though probably a little small compared to GW.
http://www.grippingbeast.com/shop.php?CatID=392 Their online store has a tonne of Viking, Saxon and Norman models for their recent Saga game.