Everybody im talking to is telling me that the iphone same as the ipod is working perfectly in conjunction with the USA SPEC and the ipod2car gm2 / gm4 so that is cool. The iphone is by far the best option for the in car phone and music. check out the info below I ripped from a site.

"I have in my car a USAspec iPod interface that allows me to connect my iphone to my OEM car stereo (02 Passat) giving me control of the iphone with the steering wheels controls, the iPhone works fine in it."

I also found

"The Apple iPhone was designed with cars in mind. It does Phone, GPS Navigation, Music, and more. It can be integrated with vehicles that are not iPhone Ready. When the adapter is connected your iPhone will play music over your car stereo with full quality sound, provide full GPS navigation, and the phone will remain active just like the Factory iPhone integration. This is the best iPhone car adapter kit available on the market.

Features

* Compatible with all iPhone models.
* Compatible with most cars using included cables.
* Bluetooth Support Optional (Does not charge iPhone)
* Full quality audio playback over your car stereo speakers
* Powers and Charges the iPhone
* Live access to your Google Account
* Pivoting iPhone mount allows you to rotate the iPhone 90 degrees.

This adapter does not send the iPhone music or phone calls over FM radio. Apple's iPhone connects directly with the vehicles computer and audio systems to provide control of the iPhone from the car stereo, full quality audio, steering wheel control, and even iPhone quick car charge mode as offered in select 2008 model vehicles."


Has anyone hooked their iphones up to their peripherals or usa specs yet? Whats going on for you all?