Anyone know if there is such a thing available? I have an mp3 deck with an aux (xm, ipod, etc) rca input. I was thinking...If i had a cable which would convert a usb signal to rca's then i could play new mp3's through my usb pen drive as i rip them, without having to burn a new disk everytime. So much quicker and easier and cheaper. If an adapter like this doesn't exist already remember it was my idea!