there's been one other adaption of this epic fantasy quartet made in the form of a tv mini series. Both are only loose adaptions tho where the mini series uses the first two books of the quartet, the studio ghibli anime uses the last two.
http://en.wikipedia.org/wiki/Tales_from_Earthsea_(film)
studio ghibli has made a film based on earthsea, by Le guin
Moderator: Bmat
I think there is a bit of a spiritual aspect to the Earthsea books that might be rather hard to translate to film. The filmmaker would have to capture not only the actions, but the emotions as well. A good filmmaker may be able to accomplish this, but a less-skilled one would probably miss this important aspect of the story.
"I'm going to do what the warriors of old did. I'm going to recite poetry!" Andrew of Armar.