Currently Being ModeratedDec 27, 2012 11:50 AM (in response to gina@cydonia)
If you're just looking to play audio, the easiest way is to buy an AirPort Express and connect your stereo to the miniplug jack, then play using AirPlay. That's how I do it! And as an added bonus, it can extend your wireless network.
An AppleTV would work too, if you're also looking to stream video.