If you have a mini it goes perfectly with an iphone. They seem to fit together.
I just saw the iphone commercial and website and they both show the Italian Job mini's playing on the iphone videos....that's the clincher. Oh and the ipod convenience package!

 

Since I grabbed my iPhone, I haven't been able to listen to it in my car as the aux cable won't fit the iPhone properly... should really look into the ipod package from the dealer.