iTunes Tagging bridges two of our favorite features-to-wish-for: HD Radio, and iPod control. Want to know what iTunes Tagging does? When you are listening to an HD station, your radio is reciving not only data to play the music, but also some information about the song being played. When you hear a song you like, you can hit some sort of TAG button on your reciever and it will store the song information on your iPod. Later, when you dock out iPod with your computer, iTunes will see the tagged information and find it for you to purchase. That's pretty handy, even if you don't end up purchasing the song.
Having a car with no room for a double-DIN multimedia/navigation dynamo, and already having a capable little GPS unit, the only thing I really want to make sure to throw in the mix is Bluetooth for hands-free phone calls. As of right now, there are a few head units on the market that support all of these, and many more that can support both Bluetooth and iTunes Tagging with just a single added accessory. The accessory is not always the same. Some head units need the Bluetooth module added, while others need the HD Radio.
I have found units on the very inexpensive end of the scale from both Dual and JVC, and more costly setups from Alpine, Pioneer, and Kenwood so far. I'll let you know if we end up with anything, and how well our iPod user likes it.
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