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!"
I find it out that Q4 would be so critical when interest in High Def Disc interest in so low, from the NPD survey
http://www.engadgethd.com/2007/09/23/npd-group-reports-on-hd-disc-format-adoption/