The Feds have released a recommendation banning the use of cell phones while driving.  I concur with their recommendation.  Having used a cell phone while driving, I can testify that it is definitely a distraction.  Plus, I have witnessed countless drivers on cell phones who are totally oblivious to their surroundings.

While, this would be a difficult law to enforce, it can be done none the less.  After all, the police have sting operations for those not wearing seat belts, the same could be done for cell phone users.