Consider this post a temporary solution (for Apple users)....with that being said, I found this iPhone app that attempts to play music from one source (iPhone/ipad/ipod) on multiple Apple devices within bluetooth range. So, the good news is that one iPhone could potentially stream to several iPhones within bluetooth distance and the app is free (TuneMob). Now the bad news, each phone would need to have the free downloaded app (directions on how to sync each phone is on their website). Song list is limited to your iTunes library or a Soundcloud account. Unfortunately, I haven't got the Soundcloud account to work on the app yet.....still experimenting. Each phone would need a 3.5mm cable to plug into your radio's AUX input since the bluetooth is unable to stream wirelessly to your radio and connect through the TuneMob app simultaneously. I've tested the app on my iPhone and iPad and it seems to work okay....I had both devices playing in different rooms, one upstairs and one downstairs. This app is far from perfect and i'm still anxiously waiting for WetSounds to release the A-link!