I enjoyed the book for what it was - fiction - and I expect to enjoy the movie for what it is - fiction.
I really enjoyed the book too and I will see the movie. I believe "The DaVinci Code" is just a suspense novel with a wild premise, (like all the rest of them) and it is disingenuous to suggest it should be anything more. Works of fiction don't need to be totally accurate in the same way as nonfiction - just because the Titanic turned out to be unraiseable, that doesn't mean Clive Cussler's "Raise The Titanic" wasn't a great action novel.