There are many ipod car adapters that are now available for use. The most common adapter available is the ipod power adapters. This allows you to use the cigarette lighter in your car to charge the ipod when you are driving. This can be very convienient, especially if you are going to be doing a lot of travelling.
Other adapters that are very popular for the ipod are ipod car transmitters. These FM transmitters allow you to use the radio in your car to play the music that is on your ipod! This can really be useful when you spend a lot of time in your car driving for hours a day. It works by broadcasting your music as a FM signal that your car can pick up. The trick is to find a frequency that is not being used by any local radio stations that allow for you to broadcast on that channel. Once this is found, you should be able to wirelessly play music in your car. This can be a great solution if you do not own a car that has native ipod integration.