Belkin will soon introduce the TuneFM, a new FM transmitter that lets you listen to the music on your iPod through any FM stereo receiver.

The TuneFM plugs into the headphone and remote jacks on the top of third- or fourth-generation iPods, and features a large LED display that shows the current FM frequency. It has channel up/down buttons and two programmable preset buttons for favorite frequencies.
“Proximity switches give you total control at the touch of your fingertips, and the LED display indicates FM frequency and memory preset, eliminating the need to use the iPod interface for frequency selection,” explains Belkin. “Because the TuneFM is powered by the iPod, no batteries are required.”