I've sat in my friends' G35s and they all have the ipod conversion where the text is displayed on the navigation and it charges at the same time. What options do we have to do something liek this. I'm sure there is a way to control an ipod through our navigation or a hack for a navigation

 

Yes... PLENTY of discussion regarding this in the past several months (to one year)

Look the in the Audio FAQ section .. all the info you'll ever need.