Ponyo is the tenth and newest film from filmmaker Hayao Miyazaki, known for such movies as My Neighbor Totoro, Princess Mononoke, and more recently, Howl's Moving Castle. The movie--which was released in Japan during July of last year--has won several awards such as Best Animation Film of the Year and the Outstanding Music award. The film's release in the United States and Canada is set for August 14th, 2009, with a Europe release set for a rather disappointing April 2010.
The plot concerns the tale of a young fish named Ponyo, who dreams of being a human girl a la The Little Mermaid. As a result, she ends up meeting and befriending a five-year-old named Sosuke. They presumably proceed to have happy fun times until something horrible and tragic happens as per standard movie fare.
Also featured in the English release (which can be seen in the promotion poster) is a more or less all-star cast starring Matt Damon, Tina Fey, Cate Blanchett, Liam Neeson, and more.
I personally, as a fan of Miyazaki's other works, am really looking forward to the release of this movie.