I have a Pro with my old DVD collection on it, and an ATV downstairs. My Network is an Extreme, the one-old model. I have Home Sharing turned on between the two. Unless iTunes is actively running on the machine, and the machine is awake, Home Sharing content does not appear on the ATV. I was under the impression that the Express was supposed to act as a mediator, waking my Mac on demand. It used to work. Is this no longer the case? I can understand having the mac awake to download content, but just to browse file is annoying.