LinuxMCE does a great job with my Mp3's, it's pulls album art from inside the tunes and even uses it as the folder thumbnail in my Artist/Album setup.
I LOVE the missing cover art tool in the web interface, I've tried em all and no other solution would find art for commonly worded band names such as Live, Sky and Band.
But why doesn't LMCE also create a folder thumbnails for each of my picture folders? This would be the intuitive extension to how it handles MP3s.
I'm using the LinuxMCE folder structure on a NAS device. Thanks!