Finally CHP has it now from July 1st 2008.

All those drivers above 18 years, need to use a hands free while talking on cell phone.

Highlights :

• Fine is $ 20.00 and $50.00 there on.
• No Points and DMV is not going to assign points. This is considered an offense.
• If you are driving a CA registered in vehicle in another state, you still need to use hands free.
• You can use a SPEAKER Phone [ : ) ]

More information is available @ http://www.chp.ca.gov/pdf/media/cell_phone_faq.pdf  

Tips :

• If you planning to buy a new car, most of the cars now come with Bluetooth integrated might cost an extra 2K, but it is very nice.
• more to come…..