Rented this one last night. It's quirky, really dry, and features Bill Murray and Owen Wilson. It's basically everything you'd expect from a Wes Anderson movie, and that's a good thing. I really enjoyed the way they animated the sea creatures (all stop motion animation) and how so much of it was shown like it was an elementary school science video.
8/10 - would have probably been 7/10, but Cate Blanchett adds one on her own. See it if you liked Rushmore or the Royal Tenenbaums, but I think it's still a pretty accessible movie.