Excellent. The audio works fine for me on Android 2.3.3. Do you have Flash installed on the phone?
To center the audio controls you should be able to move the closing </div> from after the <img /> tag and put it after the closing </audio>.
Edit: You need to go and get the Word Press Audio Player from my previous post and upload it so the audio-player.js, player.swf other files are located in soundgems.co.uk/audio-player/
EDITED: 9 Apr 2011 18:56 by MATT