GSI Super Quality In-Car Wireless Hands-Free FM Modulator-Transmitter for MP3/MP4/iPod/iPhone/CD/DVD Players - SD/Memory Card/Flash Slot - Line-In Function - LCD Display - Cigarette Lighter Plug - Includes Remote Control - Yellow
This FM xmiter seems to work fine.  I found a clear station at 106.3 and it transmits with little noise.  I found I had more noise at the other end of the FM dial.  In any case, it does what I wanted, sends podcasts and audio-books to my car radio.  The remote works as well, but there is no way to fast-forward into a track with the remote as far as I could tell.