chaley - I see on your site you have a php server... I'm not a UNIX guy, but I'd love for a way to run a content server on my ReadyNAS - after all, that's where my libraries are, and my PC goes to sleep after a couple hours of "lack of attention".
Since the ReadyNAS runs on Linux - is that what your php server code is for? There are lots of addons for the ReadyNAS (Plex, etc)...
Related to that, I have 3 separate Calibre libraries - mine (Sci-Fi, mainly), wife (anti-sci-fi), and "youth" for the kids... but I don't see a way to switch back & forth between libraries
