I've read about some restrictions on using these while driving? What can and can't you do?

Currently, I use a BT headset with my Motorola phone with voice dialing. I can push one button and then tell it to call someone in my phone book. Would that work on the IS while driving?

 

The car uses the "handsfree" bluetooth profile, not the headset profile, so you can't use the voice dialing features on the phone. You can use the voice dialing features built into the car, though. You can "Dial by number", or if you record the names on the car's telephone directory screen, you can "Dial by name". The accuracy of the name and number recognition on the car are okay, but not nearly as good as my Motorola RAZR.