Drive now, talk later is the slogan of a grassroots movement against the use of car phones while driving.

They have a web site at http://cartalk.cars.com/About/Drive-Now/.

On this web site they offer a free bumper sticker, as well as their opinion about the issue at hand.

They offer both scientific and non-scientific evidence that talking on a car phone while driving means you are not paying attention to the road.

They also explain how to get involved in pushing for legislation.

By the way, the web site, the bumper sticker, and the movement, are sponsored by Car Talk on NPR (that is, National Public Radio, a non-profit radio network in the US).