This is a great plugin but Flash fallback doesn't seem to work on IE6.
I have Flash 9 installed on IE6 but it just provides a text link to download the mp3 file in place of the player. While I appreciate that's a reasonable alternative for out of date browsers I'm not sure why it doesn't offer a Flash alternative as it says it should in the documentation/compatibility matrix.
To deter downloading of my mp3 files I'd be willing to pay to have this implemented in the WordPress plugin.
And one other option I'd like to be able to implement is that when I have several posts, each with a player embedded in them, and I click Play on each one, they all start to buffer in series, causing a queue of buffering tracks. Is there any way to shift focus so that if I click on a new instance of a player, previous ones stop buffering? Again, I'd be happy to pay for this amendment - feel free to contact me if you're interested in customising it for me.