First the bad news. Click here for the CHP description of the new law, and what happens starting 7/1/08 if you are stopped driving and talking on a hand-held cellphone at the same time. Note to parents of under-18 drivers: They can't drive and talk under any circumstances--I had no idea!
Then the solutions. Here's a nice piece from the Mercury News on approaches to meet the law's requirements, depending on your uses and needs.