That's good news, although supposedly Ursula LeGuin was to be in on the Earthsea movie and they just basically dissed her. Hopefully that won't happen here. Since this is a film instead of a tv movie, they'll probably do a better job.
I've been looking for cheap paperback copies or used copies - that limits what I find. Our library does have two copies of The Lion, the witch and the wardrobe. However, one has never been returned and the other is an illustrated childrens reader - much edited/shortened and cut down. There is only one used book store in my area and I get there as often as I can but there must not be a great deal of scifi/fantasy fans around as that section is smaller than all the rest (including politics and poetry!).