Maryland just enacted a ban on using a hand-held cell phone while driving. An online poll accompanying the Baltimore Sun article asks, "Will you stop using your hand-held phone while driving?" As of now, 25% of people have chosen the response "There's no way I can ever live without using my hand-held phone while driving."
On most other issues, a newspaper wouldn't dare pose the question, "Are you going to obey this law?"
Here in DC, where we already have such a ban, a guy pulled out in front of me the other day while talking on his cell phone. He was in a convertible, so when I passed him a moment later, I yelled "Hang up and drive!" This naturally earned a string of expletives from him.
We obviously have a cultural issue to overcome before we can get proper recognition of the danger (to you and others) of talking on the phone while driving.