I'm working on a Bluetooth solution that provides full frequency stereo audio and supports A2DP mobile phones. THe idea is the phone and MP3 player will pair simultaneously and music will be interupted if a call comes in. The noise cancelling for the mic is the biggest obstacle, we have a mic design that is working well. I use a prototype daily so I don't miss calls while communting and listening to my iPod. I ordered shorter cables for my Ultimate Ears SuperFi Pro 5's and still get great audio quality. I bet there will be a few products of this type out there soon...