According to
www.yournissanparts.com, that option is only available for the 6 CD changers. I didn't get the premium package, so I don' thave the 6 CD changer. And, if I did, I'd be able to play MP3 CDs, which would make having an iPod interface less important.
Given that a 6 CD changer cost almost $700 (CDN), and then I'd have to add another US$200 for a iPod inteface, I think I'm going to put in an after market deck.
I just found out that Alpine has released their new 2006 decks, several of which have a direct iPod inteface starting at US$200.