I'm really new to Apple as well as car audio as well. I am having trouble actually connecting the iPhone 4s to the unit. It pairs with the phone fine, I can dial out with no problem. The issue is that it doesn't really connect when trying to stream audio and I don't know how to stream Pandora or Aha to the unit. I haven't tried Aha yet. I'm more concerned with streaming music from my phone via Bluetooth.

The only thing that streams over BT is the phone, everything else goes through the cable. I can't speak to jailbroken phone or head units, that might be a different story, but out of the box, it all goes over the wire.