Arts Technica has posted a review on the Harman/Kardon Drive + Play

Go into any Apple Store and you will see people buying iPods from the time the store opens until locking up for the night. Chances are, many Ars readers own one or have at least one family member who does, maybe even two or three. They're great for listening to music while walking down the street, riding your bike, and working. But driving? Taking several thousand of your favorite songs on the road with you everytime you go for a drive is a beautiful thing, but the question of how best to enjoy your iPod in the car remains.

Harman/Kardon Drive + Play Review