The Onkyo wireless adapter is worthless. Get an Apple TV for $99 and/or a wireless bridge to connect to your Onkyo's Ethernet port. It will work 100 times better. I had the Onkyo adapter, and listening to radios via the NET feature was terrible. Once I set up an Apple Airport Express with my wireless network, and connected it to the Onkyo, the NET radios worked perfectly.
can you please tell me how you made out with the itunes? I have been trying to find out the same answer before I purchase this receiver. Will I be able to just play my itunes from my computer since it and the receiver will be on the same network? I really like this receiver, and do not need the airplay- as long as this other method of accessing my music is available.