Hi,
Well if the animation movie you are referring to is 'les triplettes de Belleville' it might very well be an amiga. The movie is partly made by belgians and a year ago I visited alot of animation departments of art schools here in Belgium and all of them had at least one amiga. The school I went to, Rits in Brussels, has TEN A4000s at their animation department. They were mainly used for time-lapsed framegrabbing I guess, and it seems they are still being used regularly.
I have not yet seen the movie but friends who did told me it's brilliant.
Justin