HTML5 vs. Flash
Apparently there was a challenge, and here's an HTML5 response:

"This demo uses Mozilla's Audio Data API for beat detection, FFT and waveform rendering; SVG Filters for the bloom effect; WebGL for the 3D box'o'Jackson in full-awesome; Ogg Theora HTML5 video playback and some special JavaScript libraries by the Mozilla #Audio hacking team that brought you Flight of The Navigator in all of it's WebGL glory.  (HTML5 Can Dance! from Bocoup on Vimeo.)

The actual demo renders fully only if you have Firefox 4.