Nokia and Lexus have announced the Lexus Integrated Phone System. It lets owners of some (higher end most likely) Lexus vehicles and a Nokia 6310i phone to integrate the phone's data and capibilities into the vehicle.
"The phone transfers its phonebook to the dashboard-integrated color screen. Individual names can be accessed and dialed via touchscreen control on navigation system equipped vehicles. Additionally, up to 20 of these transferred numbers can be assigned a voice tag, allowing users to make calls with voice commands." - MobileMag.com
We'd really like to see Bluetooth integration and a public API for this, but it's a good start.