Google has released an update to the Car Home app with features that are available in Custom Car Home. The app, which is available for the Nexus One and Motorola Droid, is a menu optimized for display in a car dock and has large square buttons to launch apps.
The new version now allows users to add their own menu options to launch whichever app they desire. You can also select a picture as a wallpaper to display in the background of the app. Previously the app automatically launched whenever the phone was inserted into the car dock, but the new version also supports selecting any Bluetooth device paired with the phone. For example, you can configure the app so that if a Bluetooth speaker phone connects the Car Home app will automatically launch. The Google Car Home app should be available in the Android Market soon.