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!"
From a business standpoint it's a very good idea. Selling the equipment used to play the software you sell and rent is a natural. I am assuming people making the smart-ass posts are not in business. This would be a much better move than buying ccity. Although, maybe Blockbuster would make the changes necessary to turn around ccity. Like re-hiring the experienced salespeople.