Just wanted to thank you for writing this.
I'm creating a flash/amfphp mp3 player for a site that grabs data from mysql, and your source has made this possible. Actionscript says it has support for ID3 tags (like it says it has support for many other things, but implements horribly), but no matter what I do I can't get it to read them -- it kept spitting out 'undefined'.
I can now query and have php pass all of the mp3 data I need to flash in order to make a nice and informative GUI for this player. THANK YOU!
Dan Dean