Let the hive mind of Engadget get that for you.
"I am looking for a device that will stream sound from one source to several recipients. For example, I want to stream sound from my TV or stereo to my phone or MP3 player that has radio and Bluetooth capabilities. I have looked into radio transmitters and they seem like a decent choice, but I can't find one that uses external power (USB or from the plug) and I would want one with a transmit range of around 50 meters. Thanks!"
That one is nice as well, but this would be more inline with this specific cable:
http://www.monoprice.com/products/product.asp?c_id=104&cp_id=10419&cs_id=1041907&p_id=3733&seq=1&format=2
Or the other way:
http://www.monoprice.com/products/product.asp?c_id=104&cp_id=10419&cs_id=1041907&p_id=3850&seq=1&format=2
Either way you go though, $3 compared to absurd will win out every time.