New to this forum and I appreciate all the posts. Here's what I am trying to achieve and am hoping someone way smarter than me can provide guidance: 1. I have a new Mac Book Air - OS 10.7.2 2. I have the latest version of Itunes (10.5.3). 3. I have a Denon 2112 AV Receiver that is an Airplay Enabled device. 4. My son can play his music on the Denon from his IPhone. 5. I can play music from my NAS on the Denon Receiver. 6. I don't have Airport Express or Airport TV. What I want to be able to do is use my macbook air to stream my iTunes to the Denon airplay enabled receiver. Basically the same functionality as what is available on the iPhone and iPad. I looked at the Airfoil application and that doesn't look like what I need. I was hoping that I could find a way to do this without buying anything else. Or do I just need to bite the bullet and get an Airport Express or Extreme. If so, which would suit my needs. (All I really want to do is take my Macbook air to the back yard, pull up iTunes and play it on the Denon AV receiver on "zone 2", my outside speakers. When I have parties, set up my macbook as a little 'DJ" station and let people pick their songs. Thanks.