A few links on reasoned Christian responses to Philip Pullman:
Article by Mark Greene at the London Institute for Contemporary Christianity - excellent starting point. With a bit of formatting you can print it off on 2 sides of A4, for people who don't have web access or who prefer to read 'real' documents.
Various materials and links from Damaris. There's also a book, Dark Matter, on Pullmans thought and writing.
Report from Ekklesia on a debate between Pullman and the ABofC
Interview from the Catholic Herald with Pullman
Richard Frank takes issue on his blog with people calling for a boycott of the movie.
Other takes on Pullman here, here (journalist Peter Hitchens, not to be confused with Christopher Hitchens, is a fellow National Secular Society patron with Pullman) and a debate on Ship of Fools
Finally a page from Pullmans own website, with the text of a talk he gave on religious education, which shows where some of his thinking comes from, and gives some of his critique of religion.