I just so happened to stumble over this article
at bit-tech.net. Interesting, no? It sounds like that dev saying there wouldn't be any expansions was a load of hot air. Knights of the White Stallion here we come, apparently!
Of course, I won't 100% believe it until Bethesda confirm it. But it's looking pretty likely.
EDIT: I was right about not believing it. Or so it seems, anyway. GamersReports have spoken to Pete Hines
, and it's been confirmed that this was a false alarm. Notice he says no "announced" plans. We'll just have to see.