the author of this app says:
Looking to sort, edit and search your MP3 playlists? This application searches your hard drive, finds all of your MP3 files and allows you to arrange them.
It can be a little tricky getting started, but once you have your list of MP3s located on your handheld device, you will be rockin' and rollin'. You can create custom playlists and export them to your desktop, so your songs will be ready for whatever system you use to listen to tunes. You can browse your collection by song, artist, album and more. You can even check out the statistics and desktop path for each MP3.