One of the drawbacks with the Squeezebox (or, more accurately, the server that feeds it), is that it won't automatically pick up new music that you add to your music library. You can set the server to periodically rescan (eg overnight) but, invariably, I want to listen to the new music when I've just added it.
So, to help with that I've developed the AutoRescan plugin. It quietly monitors your music library and will add new tracks as soon as you drop them into the music folder. It will also identify tracks that have been moved, copied, renamed or deleted. You can find details of the plugin, and a download, here.
Note: this functionality is due to be moved into the core of the Squeezebox Server from version 8.0 and so this plugin will no longer be necessary. However, at the time of writing that's probably still quite a long way off.