In a new interview with Crave Online, Guillermo Del Toro talked briefly about the upcoming Hobbit movie:

Crave Online: I know it’s too early to talk casting, but doesn’t James McAvoy sound like a good idea right about now?
Guillermo del Toro: Really, if I was to answer either way, it would be unfair because I will tell you, Bilbo changes every time we write a new scene. It really is not facetious. Wherever we end up at, it’s going to come out of those pages.
Crave Online: But that was the most publicized rumor.
Guillermo del Toro: Yeah, but the fact is, the only thing I know of McAvoy is his movies. I’ve never met him. We’ve never had a chat and this is not me saying, “I did not have sex with that woman.” It really hasn’t happened. If it happens with any actor, I think it’s going to come out of the pages.
Crave Online: Have you made any casting decisions?
Guillermo del Toro: Not yet. Just the ones that have been announced. There’s not lack of information. It’s not withholding. We really don’t have more information because we’re writing. And literally, like every week, what you discover writing the two movies, writing the two stories, it changes. So every week there’s a discovery and anything we say this week would be contradicted next week. Certainly that would be true in casting. Why create hopes or why create expectations if down the line you’re going to go, “You know what? That was not a good idea.” So we won’t cast it until we finish writing.

Thanks Crave Online!