I am soon to get an Apple TV as a lightweight way to get my media content into my living room. I am however, concerned about the fact I will need to have my Macbook Pro on at all times to use it. My MBP is fast running out of space so do not see it being the ideal tool for my media needs. I have been thinking of getting an old, always-on Mac mini (Power PC G4 or G5) to run as a headless iTunes pusher, so that my MBP and also the new Apple TV are able to access my media (mainly music and photos, but building up a video collection as well) wirelessly. Will there be compatibility issues with such a gap in the age of the hardware, as I'm aware that the Apple TV can only pull data via Home Sharing, and am not sure if a Power PC mini can support this. Is there anyone here that is running the same - or a similar - system?