eKanji is...

eKanji is the most beautiful and efficient way to learn Japanese kanji. Available on iPhone and iPod the summer of 2009 and expected on all portable formats soon. Includes 3 color schemes to choose from, an interactive interface and the most widely used examples of each character.

Don't know any Japanese?

Then eKana is the place to start. eKanji and eKana are expected to be released on Apple's iTunes Store roughly the same time in 2009.