If you are into online music, you may want to point your browser towards Songbird and see what it would be like if your media player functioned with your browsing. Sure, there's "Foxytunes" - an extension for your Firefox browser to control various media players, and there's ways to embed WMP into IE, but this is something different, and possibly the best way to experience music on the Web.
http://www.songbirdnest.com/home
What's cool, is that it's built on Firefox! So for those of you already in love with Firefox... here's your new friend!
If you are not into beta software - you can still get excited about Songbird and learn how it works - just take a look at the screencast/demo they posted the other day:
http://download.songbirdnest.com/screencast/
Have I tired it... no, not yet, but it's on my list of things to check out.
If you try it out, post back here with your thoughts about the software.