So, I just noticed that in iTunes 4.7 you can open multiple instances. I currently have one running on my account, and one running on my wife's account. I don't recall being able to do this. This kills two birds with one stone: 1) Now I can play music through my attached speakers for me in the office, and for my wife via AirTunes somewhere else in the house. 2) The main library has always been my library because I do most of the importing and whatnot. My library shows up as shared music in her instance (and vice versa), therefore she has access to all my playlists and everything...very nice.