I just ordered this and am so excited. Steering wheel controls and I don't have to take apart my dash!!
So for you audiophiles, I'm thinking you should use two devices. Tune2air plugged into the usb ycable for steering wheel controls and track info on the display (but not audio). Then use a direct wifi device for actually transmitting the music, such as:
http://www.amazon.com/Phorus-PR1-Rec.../dp/B007RFMRBG or an Apple AP. Plug this device into aux and configure your phone to play though Airplay (or android equivalent).
Does this make sense to you guys who need lossless? It still seems cheaper, easier than all other solutions.