On: NY Times Measures How Reaction Time is Affected by...

[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 → stcredzero]

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.