It's a nice flash mp3 player developed by Fabricio Zuardi , thanks to him we can use his opensource code and use it on our sites. You can find the sample of this on the right frame of my site, with some of the songs i've been listening to this week very intently and singing silently and with some hand movements (specially Viva La Vida by Coldplay) whenever and wherever it's playing.

It uses xspf or a "spiff file", an xml shareable playlist format. You can learn more here:

http://www.xspf.org

You can learn more on this web MP3 player from his site at sourceforge:

http://musicplayer.sourceforge.net