Even if I'm not American (Born and bred in Europe), in the L.A. area, there's only one animation school with a really big reputation, and that's CalArts; Disney recruited a lot of its personnel from there, and what I've heard, over the past years 3D animation was added to their curriculum.
From what I've heard, it's not all technics there, they'll teach you how to be an 'actor' as well.
So you might want to check them out, too...