Jamie and I went to see the movie last night (she just finished the book this week) and we both liked it okay. It's been so long since I read the book that I'd forgotten a lot of the details, so I probably missed a lot of the changes. The plot had been simplified somewhat, but what surprised me was that the central theme seemed to have changed from "oh, how controversial it would be if we found out that the church was supposed to give women a much more equal role (because now we know that Jesus married Mary Magdalene)" to "oh, because Jesus married and had a child, he was mortal, not divine." I never followed the logic of the second - having a child wouldn't contradict Jesus' divinity at all, from a theological point of view, but it did make for a much more urgent problem for Christianity because if Jesus wasn't divine - well, then, we've been headed down the wrong path quite a ways here. The whole issue of Mary Magdalene as a emblem of two millenia of suffering by women at the hands of a patriarchial society was, I thought, the whole point of the book, and it was largely sidestepped, which sort of made the ending a little anticlimatic (although I did appreciate their making it explicitly clear where she was, including showing you the actual sarcophagus).
Overall, an okay movie, but I think it worked a lot better as an idea-driven book, with the story of MM staying at the forefront. I still like Angels & Demons better, and freed of the controversy over the whole MM and Jesus issue, that movie mighty actually be able to pick up and go. This one never quite did.