Songbird Library Displays if songs are on Ipod (zune, mp3 player, etc) or not.

I am new to Songbird and like the fact that it is easy to manipulate and make your own. I am used to using itunes but now like Songbird much more.

I would like to know if it is possible to add a feature which allows you, when looking at your library, to know which songs in your library are already loaded on your currently plugged in media device (zune, ipod, etc)? It could be as simple as a checkmark or colored dot ( green for on ipod, red for not on ipod) that is in a column of it's own which corresponds to each entry in the library.

I am not a developer so I cannot make this, but I know many people would love this feature and use it regularly. My Library is enormous and so is my ipod capacity. This tool would add a ton of simplicity to a big problem. It would allow you to quickly scan your library for music you don't have on your portable media device. Of course this feature would only be functional while you have your media device plugged into your computer and recognized by Songbird. I know you can also negate this problem by just syncing your ipod to your music library, but in my case this doesn't work. My Songbird library is much bigger than my ipods capacity. If there is already something out there like this then can someone please tell me what it is, or how to turn it on. Thanks a bunch. Hopefully someone can run with this idea.