I’ll shamelessley resurrect this, since I was out of town when it was active.
I’m glad that they’re cutting Bombadil. No, no, put away the pointy sticks, I do really like the old fellow. It’s just that they have to cut a lot to make the movie (at least, if they insist on doing one movie per volume, rather than one per book :)), and Bombadil is something that they can excise rather cleanly. If you take out Bombadil, you’re left with very few loose ends to tie up. Put another way, if you want them to have kept old Tom-without-a-father, what would have them cut instead?
The scoop on Eowyn and Arwen, by the way, as I understand it: The official word is that at one point, there was only enough funding to do the whole trilogy in two movies, so even more stuff was cut. Then, the budget department gave the green light for three, and stuff was put back in.
Now, at one point, the cast lists included Arwen, but did not mention Eowyn. At that time, also, Arwen was described as a “warrior princess”. It was at this time that many fans, myself included, surmised that the two parts had been combined. As of right now, however, there are, in fact, separate cast listings for Eowyn and Arwen.
OK, so much for facts. On to some speculation, it may well be that during the Dark Ages when there were only to be two movies, Eowyn was, in fact, conflated with Arwen, but they fixed that when the budget went back up.
Arwen’s role is expanded at least in so far as replacing Glorfindel, but I’ve yet to see any evidence that it’s expanded beyond that. Yes, we see a lot of her in the trailers, but it’s quite possible that they included all of her scenes in the trailers. Certainly, we never see her anyplace that can be verified to not be Rivendell or the Fords.