I'd benefit from a "Driving Mode" on my phone. If John, Rachel, or Stan calls, auto-text them: "I'm driving, can't talk". Everyone else goes straight to voicemail. If they send me a text within 5 minutes of that call (must be serious), make the font huge so I can read it in .5 seconds on my console. Hide all other texts.
I'd like to be truly responsible and just turn my phone off, but I don't to allow for those few times when there actually is something important.
Siri is already the "Driving Mode" feature on the iPhone.
Hooking it up to the stereo system makes it feel like it is part of the vehicle. Some day, when I am feeling adventurous, I will wire the otherwise useless OnStar button to trigger it to complete the "factory look."
I'd like to be truly responsible and just turn my phone off, but I don't to allow for those few times when there actually is something important.