First off, I really wish iTunes provided more functionality for shared libraries on a network drive. Here is the household setup: 2 Apple TVs, Macbook Pro, Desktop PC, Laptop PC, wireless N and a WD My Book Live 2TB network drive (ethernet connection only), iPhones and iPod touch. Possible setups: 1. Everything on Network drive - Complete iTunes folder and iTunes library file as well all stored on the network drive. Pro: Every computer will always have the same files, no conflict in adding new files. Con: only one computer can be running the iTunes at a time. Must close one iTunes before opening on another computer. 2. Media files on network drive, each computer with own library file. Pro: run multiple iTunes at the same time. Con: Adding a new file isn't recognized on another computer. Duplicates likely with automatic iTunes download for purchases. Then having to manually find/add files into another library that were added from a different computer. 3. Desktop running all the time with everything stored on the network drive. Each computer running a separate iTunes library and just access via Home sharing. Pro: easy to maintain one library Con: Must sync with desktop computer for iTunes, laptop won't have files. Are these the only options? Ideally what I would like is to have all the files on the Network drive, every computer with it's own iTunes library. If music/videos is added from one computer, all the other computers will update iTunes to show the files the next time it's started. One last concern: streaming movies over the network. If the apple tv is accessing iTunes on the macbook pro (which is reading from the network drive), is there going to be a huge bottleneck on the wireless network. Essentially the video is transferred from the network drive -> ethernet -> router -> wirelessly to the laptop (iTunes) -> wirelessly to router -> wirelessly the apple tv. So essentially 3 streams at the same time on the wireless network. I'm assuming it's not smart enough to go from the network drive via ethernet to the router wirelessly to the appletv (1 stream).