I'm bookmarking that link, thanks! I had plans on using FlarePlayer, it does audio and video, but it appears to have been abandoned.
I've tested jPlayer and audio.js in the past. The problem with both of these is they are heavily reliant on JavaScript, jPlayer requires jQuery in particular. The level of support we would need to provide increases anytime we introduce more complications at the presentation/theme level. There are so many poorly written themes that if we did provide JavaScript based players it would be via a separate plugin, exactly how we added VideoJS.