the i-phone version sounds like a good idea.
it would be easy to do and because there isnt much games out at the moment on the i-phone im sure apple will be happy to force it onto everybody who has a i-phone...
it wouldnt be as fun as it would be on the computer. the ds's graphic are not very good. gives me eye strain on a few games lol. BUt im sure its VERY possible. especially with the touch screen. click them joints! and the d-pas could move the screen.