Buy.com has the Kensington 33361 Micro FM Transmitter for iPods for only $19.95 after a $20 mail-in rebate valid through 1/28. Compare this to $47 at Amazon. This is a tiny transmitter that plugs into any dockable iPod and transmits music to an FM stereo location. Shipping is free and there is no sales tax (except CA, MA, MD, TN).
No longer available