I am an iPhone Dev, so I currently have access to the latest seed of the iPhone software. Previously, when running 2.1 my iPhone would complain that the "accessory" being connected wasn't compatible but things still worked just fine (played music, charged, etc). Now however, I don't get any message on the iPhone (other than it is charging) but the AVIC after about 10 seconds throws up a message saying "Unable to connect to iPod, please reconnect."
I've tried just about everything I could think of (disable bluetooth, enable airplane mode, fresh restart). So it looks like some of the changes Apple made with the 3.0 firmware have caused it to break compatibility with the AVIC and the iPod cables. If anyone here has contacts with Pioneer, I can supply a FEW copies of the firmware (I type in your device ID, and you can upgrade). Note that you can not downgrade back to 2.0 once you upgrade. I am not looking to just give out copies to everyone, but rather people that could actively work towards getting things up and going again.
Or if anyone has any thoughts on things to try, let me know.