It looks like he has been working on it, albeit years ago: http://www.ventismedia.com/mantis/view.php?id=6689 and needs something additional in order to make it happen. From the addon thread: Hello, Many thanks, ZvezdanD. This extension works almost perfectly! The only thing I notice is that there ...

Thanks Peke, the ZvezdanD script works pretty well. It doesn't really work with the crossfading. The next song starts to crossfade in and then it jumps to the next queued track via the script. Still works better than iTunes though. If you come across anything even better please let me know!

So I switched to MM a couple months ago when I got fed up with iTunes and it's been pretty smooth sailing since the change. The only thing I miss is being able to use "up next" when shuffling the entire library. Currently, if I turn on shuffle in MM and then right click a song in MM and select "play ...