This is great.
Immediate observations.
- Really quick and easy to use already
Doesnt work in firefox but does in IE.
Doesnt play Wavs (e.g. transcoded from FLAC, OGG etc). This is a biggie for me. Lots of my music is FLAC or OGG. A little research suggests Flash wont do this out of the box, but there are solutions.
Great job. Well done