I mentioned the computer-animated Tin Woodman of Oz before, but the whole thing is up now (see this thread for more details), so I might as well say a little more about it. Keep in mind that there are spoilers for both the movie and the book, so you might not want to read ahead if you still want to be surprised.
Graphically speaking, it's quite well done. There are some problems, like the way they portrayed Mrs. Yoop (come on, she's just a giantess, not a dinosaur-ogre) and Ozma, but they kind of made up for it with the transformed characters and the Hip-po-gy-raf. And while I don't care for the addition of the Tin Girl, I kind of like the way she's rendered, with the metallic hair and all. I'm disappointed that Polychrome isn't there, what with her being one of the most animated characters in the series anyway. I wonder if they left her out in a general attempt to remove references to earlier Oz books, which might also explain why they cut out Jinjur, the Magic Picture, and the Red Wagon.
My main problem with the film was with how the plot played out. While Tin Woodman isn't one of my all-time favorite Oz books, I appreciate that L. Frank Baum didn't go for the obvious happy ending when writing it. That's not to say it's a SAD ending, as everyone ends up happier than they probably would have been with a more traditional ending, but it's a bit of a disappointment after the long quest. Baum's strengths often lie in overturning clichés and emphasizing characterization, and he does that with the book. If Nick Chopper still loved Nimmie Amee (as the movie implies), he would have looked her up years ago. And it makes perfect sense for her to have moved on. People who insist on Nick and Nimmie getting together in the end seem to be suggesting that you should be required to meet the first person you date. (Granted, that's what I did, but I don't pretend to be normal in that respect.) The book doesn't totally go for the clichéd ending, and does include the scene of the meeting with Nimmie Amee, but they move it from the conclusion to a much earlier part in the story (and they retain Chopfyt, even though he doesn't make much sense without the absent Tin Soldier), and come up with a way for Nick to get a girlfriend after all. It just doesn't seem right to me.