Ratatouille: Saw it, loved it. Brad Bird's best work so far. The animation was amazing, incredible film all around.
If you haven't seen it already, The Slate has a great sideshow of Brad Birds work up tell now. It has great video clips of all the stuff he's done up tell now. I especially like slide number 5 where it shows a clip of his animatics. I've heard about this. He uses After Effects to practically animate his film before it goes into production.
Check it out: http://www.slate.com/id/2169280/nav/tap3/
click on slideshow