For the past 10 years I have converted my music from CD to MP3 and stored the music in folders by genre, artist, then album. It as always made sense to me. Imagine my annoyance when I got the N900, put my 40Gb of music on it (32Gb miscroSD) and couldn't access it correctly. In the end I made playlists of every folder, every album. This took time.
I applaud Mr Tham for filling this functionality gap.
(I know MediaBox can do it too, but it's buggy)