I'm going to start by saying that I never liked the books even as a kid. I was much more a LOTR and Lloyd Alexander fan. The characters in Lewis's books were all pretty much spoiled English brats and nothing particularly interesting happened. I didn't and still don't care about any of the religious allegory folderol. This movie gives the impression of being made simply to have something to plug the post-LOTR holiday fantasy movie vaccuum.
Narnia is an excellent example of what can potentially go wrong with fantasy movies:
1) None of the characters are interesting, developed, charming in that little British kid way, or even remotely likeable.
2) Everything that could have been cool was pretty crappy - either because the movie was edited slap-dash and quick cut or because there wasn't really anything cool in the movie save a couple of WETA monsters.
3) The score was...well...I don't remember any of the score so that's a bad sign.
4) Aslan died because he was ashamed of being in such a crappy movie.
I hope I don't have the kind of kid who would like this swill. Then again if fed a diet of the same stuff I grew up on plus LOTR chances are they might have decent taste.