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!"
Steve Ballmer is an intelligent guy, but he's not an engineer. He has to find a business model that allows internal competition and self regulation.
Allowing some units to be listed in their own right may also be a good move allowing enthusiasm for a booming new technology or a stellar team to shine unencumbered by the rest of the MS monolith.