As a theoretical matter, it seems like a waste to specifically want to play music for your car thru an N8xx, since a car typically has very big pockets, so the N8xx's small size isn't a benefit. But I have used it pretty often, though I'm just about to go on a 7-mi jog, for which the N800 works great, and I DO need the device to be pocketable!

For cars, the FM transmitter option has drawbacks in the Los Angeles areas, where interference is plentiful. I have an old car, so the problem may be less severe with newer radios.

I wish there was a CHEAP way to listen to internet radio in my car...