Eternal Sonata for the Xbox 360 and PS3, are currently working on a new RPG for the Nintendo Wii. Entitled Fragile, the RPG follows the story of Set, a young boy who must explore various cities in a post-apocalyptic world.
Details at this time are scarce because, well, we can't read Japanese. Those with a bit more skill in the language department might want to check out the game's official website, which also features screenshots and a teaser trailer for the game.
Those that are a bit lazier can check out the trailer after the break.