G35 guys have a PN2615 or better (radio part number) they have TEXT capability. the 2414/13 that the JDM cars run doesnt support text and as such will display CD6 T-**. that said it does work quite well for music if you have some idea of the content of your ipod.
as for fitting it - if you can tear your dash down then you can fit this easily.
micah, if you are reading this show them the silver car's radio.
danny,
you drive the ipod off the radio or steering wheel. you can do it off the ipod if you want but its really not required.
geek,
its the same one I spec'd for you.