I finally saw it last night. I loved it. Lucy was amazing--I agree with e on her expressiveness. I thought it was well-done, and even if the acting (and I noticed the waterfall scene problem, too--what were they thinking?) by the kids was sometimes a little off, it wasn't enough that I felt it--and though I avoided this thread till I saw it, someone had told me that they thought the older kids were a little wooden, yet I didn't see it any worse than the writing in the book, which wasn't exactly the best-written children's book I've ever read. And as we all know, I've read many.
I didn't like the White Witch, however. I actually expected her to have the coloring that Edmund had--pale, pale skin and jet-black hair. I didn't like her makeup, and her acting didn't help. She felt very transparent from the beginning, and it seems so obvious that even Edmund should notice she's not quite right. Yet the feeling I got from the book is that at least at first, Edmund didn't think she was mean. But it's been a few years since I've reread the books.