a quick check found at:
http://safety.blr.com/display.cfm/id/96822
There is no Federal law, some states and local comunities limit cell phone use while you drive. Most of those require cell phone users to have a hands free device like speaker phone or blackberry.
I'm not aware of any law that says no text messageing, other than the law of plain ol' ordinary garden variety common sense.
Just got off the phone with my sister, last night she and my Mom were out and their car was sideswiped and totalled by an SUV. Only just averted a head on collision. The teenaged driver was very appologetic. Both of our families are all aware how close it came to being a very different kind of phone call last night.
Jeez, slow the f&*^ down everyone. Life's too short.
so very sad about the cyclist, I'm glad his wife can be so forgiveing, I'm not sure i would be able to be.