GameSpot has a story up
based on a preorder listing they spotted on GameStop for an Elder Scrolls IV:
Oblivion expansion called Knights of the White Stallion. This was removed
shortly after they contacted Bethesda Softworks for a comment on this, but they have
a screenshot of the listing, showing it was for the PC platform, carrying a
$19.99 MSRP and a November 21, 2006 release date. Their search for a
corresponding Xbox 360 SKU yielded no results, and Bethesda declined to
respond to their request for a comment.