Man, are you Kalifornians behind the times -- we've had a hands-free law on the books in NJ for years now. Sadly, most folks ignore the law and continue to hold their phones to their ears and weave in and out of traffic.
I have a blue-tooth which I only use when I'm actually on the freakin' cell phone in my car. I refuse to turn a piece of technology into a fashion statement or a bit of technology that I use to "prove" to everyone that I'm better than they are.

Sometimes I also use my cell phone's speaker phone function.
Go get wit da program, ya left coasters!!
- Z-man.