Which iPod do you have? I would recommend any of these griiffin FM Transmitors: http://www.griffintechnology.com/products/itrip/index.php
yea itrips wikid! gt one of the griffin ones in my car! works really well! perfect sound! couldent live without it!
try the dlo transmitter, i've tried many and i think this is the best. http://www.everythingipod.com/ its called the transpod