Genius Sonority has teamed up with a Japanese publishing company Chukei to release Bunagku Zenshuu, a collection of 100 ebooks you can read on your DS. Once you are done reading said 100 books, you can download more literature via WiFi. The catch that absolutely destroys the concept? The content is abridged.
The (game?) will be released October 18th with new content coming as soon as November. We're not certain that the DS screen is easy enough on the eyes for extended reading sessions, but we do fully realise that the DS can be held like a book—like a freakin' smartypants book! So we're sure it's a great idea.
The DS turned into an e-Book reader [siliconera]