JManga looks interesting! The instant Japanese/English swap function on the manga will be great for learners (skip to 1:44 of the video)—I could imagine that, in the future, some manga could also include audio of storytellers reading the story.
This is yet another example of the exciting things that computers and digital media make possible for language learning. The neat thing is that language learning doesn’t necessarily have to be the initial inspiration for innovation— advances in toy design, digital media, voice recognition, mobile technology etc. all promise to come together in really interesting and engaging ways over the next few years.