The only problem I have with flash players for music is that you have to update the playlist manually every time you upload new song. It would be great if there was a plugin which automatically added any music in the uploads folder to its playlist.
This would mean there could be a player which played everything listed on the blog or maybe you could even edit the playlist from the dashboard, selecting from any tunes in the upload folder instead of having to copy/paste/edit code.
Anyone who knows the Hype Machine (http://www.hypem.com) will have a rough idea of what I'm suggesting.
If it was a plugin rather than an embedded flash object, would this mean that people wouldn't be able to hijack uploaded music from other sites with such a player?