Saruman's larger role
One of the main changes of the films, compared to the books, is Saruman's increased role, in the first film at least (though that this can be called a main change shows how faithful the film was)
This was done, presumably, because (while the cgi effects on The Eye were nice) Sauron makes a very impersonal and faceless villain. Saruman is a bad guy you can more directly relate to; he can gloat, say cool bad guy lines and so on.
In fact, they seemed to go out of their way to give him extra scenes, even having him create the new half-breeds on the spot, rather than over a period of many years as it was in the books.
The only thing I am worried about is that Saruman is looking TOO subservient to Sauron in FOTR. Saruman was a pretty strong minded guy in the books; it's a shame to have him looking such a pawn.
Do people think he will continue to look such a servant in the coming films? And will they continue to expand his role, or will they stick to the original now (after all, he has a lot of plot in the Two Towers anyway)?