How can I listen to the 'Audio Posts' ondemand?

Audio posts require the use of the Adobe Flash player, though very common place on most browsers today, it is typically an external add-on.  Get the Flash Player from Adobe, Inc to enable this functionality and listen to the Audio posts on-demand.  Of course you can always download the file and listen on your favorite media player, but the on-demand listenening functionality should let you preview the audio before you download.