Hi, Just picked up a 40GB Apple TV and am a little confused as to how to setup streaming. I have an always on mac pro with a wired connection to my Airport Extreme N base station which in turn connects via ethernet to the Apple TV. In order to stream and not sync do I Pair the iTunes library on my Mac or do I only setup sharing? I don't want any content stored on the Apple TV itself except for movies that I rent. What are the setup options in iTunes that i need to be wary of. Thanks for any help in advance.