When I have only 1 song in an album, I would like to remove that album tag. Likewise, when I only have 1 song (or album) in a genre, I would like to remove that genre tag. (Would be nice to specify threshold, 5 instead of 1, etc) This will reduce clutter and make for a more organized collection.
My girlfriend speaks spanish, and has a lot of spanish songs. I wish we could use some language detection (on the song name) that could then "tag" (using extended tags or comment field?) the song with that language. There is a library you can use for this called JLangDetect: http://www.jroller.com/melix/entry/nlp_in_java_a_language