I stumbled across an interesting music player and manager called Listen yesterday.
I have been playing around with it for the past half hour or so and I will say that it is a definitely a decent alternative to Rhythmbox and Banshee which also appears to have many if not all of the features that Amarok has.
While playing around with the application one feature got my attention and that was its dynamic play list mode which is powered by last.fm. This mode automatically adds songs and artists to your current play list that are similar to what you are listening to.
In the end I personally will continue to use MPD as that is my player of choice but I figured someone out there would be interested in this application.
The screen shot shows the expanded interface. It is collapsible down to just the controls should you desire to do that.