It seems that Heimskringla has taken down its copy in Norwegian of "How Norway was built" (see http://heimskringla.no/wiki/Hvorledes_Norge_ble_bosatt). Before I go off googling again, it would be nice to know if anyone knows offhand where the translation went.
(side note: we should try to keep an up-to-date list of the relevant links in the project. It seems that they move over time.)