Just letting you all know: The latest edition of Game Informer (magazine) has an article on game lore. In it, it talks a little bit about Bethesda,
The Elder Scrolls series, and
The Infernal City. It says that not only did Bethesda allow Keyes to access their own lore wiki (the one that only Bethesda can use and is used as reference during production etc.), but also that they pointed him towards the Imperial Library, had him play through
Oblivion (that one I'm not so sure is such great news
) a few times, had him submit all his ideas for the story for approval, and had some pretty in depth lore discussions with him involving things like "the metaphysical significance of the White-Gold Tower in Cyrodiil." That's a little bit of a reassurance, I suppose.