Pirate VI said:your going to need the scion factory wiring harness for the bazooka which you can get at your dealer i think it is like $50, and you are going to need the iPod wiring which isnt available yet.
you can follow this link on scionlife to find out more info on the ipod wiring.
http://www.scionlife.com/forums/viewtopic.php?t=84818&highlight=