Lee Hutchinson for Ars Technica:
Building a central multi-user iTunes server that works consistently and well— that’s also easy to configure and maintain without needing remote administration tools or command line hackery—is annoyingly difficult. However, it is relatively easy to take your iTunes library and simply move it to a NAS. It’s not the house iTunes server we wish we had, but it does get your data off of your computer’s local hard disk drive.
It’s worth noting up front – as Hutchinson’s article does – that this isn’t about setting up an iTunes server for all the clients on your network. This is, instead, about offloading your iTunes library from your machine to a network attached storage device instead. There are some really good reasons for doing this.
My impetus for wanting to give this a try is my increasing reliance on my MacBook Air, which has a fairly skimpy Solid State Drive (SSD) that isn’t nearly large enough to hold my ever-growing collection of music and movies.