I started using this library more than 2 years ago. I made a php script that stored info about my mp3 collection (on cdrom) in a database so I could search in it.
About one year ago I started writing a new version of that script. Meant to be usefull for other people too. Today I released version: alpha 0.2 of it on sourceforge. It gets more and more features, but the development process isn't exactly going fast :)
sourceforge page: http://sourceforge.net/projects/phpmp3search
demo:http://members.lycos.nl/phpmp3search/