As Denshi Jisho has already supported iPhone users (http://iphone.jisho.org/), I think the Kanji Recognition feature of iPhone 3G may be useful to this website somehow.
Let's check it out at
http://www.blogsmithmedia.com/www.engadget.com/media/2008/06/wwdc-keynote_134.jpg
(In the picture, it's Chinese language. But it also works with Japanese as well)
from http://www.engadget.com/2008/06/09/steve-jobs-keynote-live-from-wwdc-2008/
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