I think the music player with a playlist customization is wonderful,
but I also think that soundmanager2 could provide more (flexibility for your site eg. by) simpler play-a-song-in-a-browser type link than current implementation...
http://www.schillmania.com/projects/soundmanager2/
There is a neat example html5 effects and soundmanager2 APIs experimental use:
http://blog.nihilogic.dk/2009/03/jav...-milkdrop.html
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http://www.nihilogic.dk/labs/juicydrop/
-Santeri