[mattf]

check these out:

http://catalog.belkin.com/IWCatProdu...ct_Id= 140984
http://catalog.belkin.com/IWCatProdu...ct_Id= 153910

i don't know what the difference between the two is, but they're the same price. not only can you now listen to mp3's from your laptop on your car speakers, but you can also listen to them on anything with an fm tuner.

note: i've never used this, so i can't say how well it works. however, it is from belkin and they have a pretty nice reputation.