[coglethorpe]

Well, there goes my startup idea for converting a steering wheel to a 6 button keypad. Seriously, it was hard enough to "steer" without even looking at the smartphone they had.

[stcredzero]

I think there is a startup opportunity for apps that will send a text message at the press of a single button. For example, one that sends an ETA message when you press a button. (Use historical data and location services to dymanically compose an accurate message.)

[coglethorpe]

Maybe something that can use GPS in your car combined with traffic data to let the folks at home know when you are expected to arrive.

[NathanKP]

So sorry to ruin your idea. But I guess its better in the long run.