The Secret of Kells
Here is a note of enthusiastic recommendation from one of the Daughters of the Flame:
I watched this film last night and it blew me away. It was astonishing. I was drawn into this gorgeous world. The animation if nothing else is stunning. But the clever way there was always something celtic on each frame, be it a swirl or design was brilliant. The story was lovely too. And the faerie was very sweet. My husband isn't sure what to make of this film. Not sure what to say, other than he loved the art (he's an artist so duh!) but he's out on the rest of it. I'd give it full marks.
The trailer is here: http://www.youtube.com/watch?v=MTPAvY4y0pY
The official website is here: http://www.thesecretofkells.com/
And here is the trailer itself: