Somehow I only just found out about this film yesterday, but my first reaction was an excited cry of "Selkie movie! Selkie movie!:
http://www.cartoonsaloon.ie/2009/06/feature-films-song-of-the-sea/https://www.facebook.com/songoftheseamovie And it's by the director of The Secret of Kells, which I really enjoyed, so that's a plus as well. But then it turned out that Lisa Hannigan, whose music I love, is providing one of the voices, so it's like they keep adding things to look forward to!
It appears that the film has premiered in Europe and is coming to a film festival in New York City later this month, but I haven't found any details yet about a wider release. I only found out about The Secret of Kells after its Oscar nomination and watched it on DVD, but perhaps there will be a wider theatrical release for Song of the Sea.