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!"
When is this coming out? That's what I wanna know!
http://www.engadgethd.com/2008/05/18/hands-on-with-the-motorola-tuning-adapter-mtr700/
http://www.engadgethd.com/photos/hands-on-with-the-motorola-tuning-adapter/812530/
Better yet, when will Tivo integrate it into a DVR (i.e. series 4?). Adding it to my already externally added hard drive-ed and sling boxed Tivo HD, is, well, getting kinda messy ;^(...