nuvi 350 mp3 player

You could use something like a Belkin TuneCast FM Transmitter - just plug it into the 350's headphone port, and tune your car's FM radio to the same frequency the transmitter is using - and your car stereo becomes the 350's speakers via the headphone port. They cost about $30.

I've had some success using a cassette adapter that is placed in your car's tape player. It looks like a tape cassette but has a wire emerging from it with a mini phono plug. The plug goes into the earphone jack on the nuvi; the cassette adapter goes in your tape player. They cost about $10 or less. You can see a picture of a typical one here:

http://reviews.cnet.com/Sony_Cassette_Adapter_For_Portable_C...

or here:

http://www.buy.com/prod/Philips_USA_G2G300_Cassette_Adapter/...

I like to load up the SD card with podcast before I leave for a trip and then listen while I'll driving to my hotel or appointment.

I used to use a cassette adapter all the time but now very few rentals have a cassette player in them. The do work very good if you can use them. Since the podcast aren't much better in stereo than not I sometimes plug a cell headset in the Nuvi.

c550 uses mp3 well too -

I download Guttenberg project ebooks, NASA ADS research papers, blogs, news, and anything written, make an mp3 by running WordRead 2 (with a great voice) to play them - throught the stereo jack to a little MUVO mp3 player/ripper - then move the mp3 back to the SD card... will alot of work - it saves a 3 hr/day commute from being useless...

And BTW Radio Shack also sells an FM transmitter for the jack at $29 and the casstte for ~$9... bth work well...

Paul