Screaming Penguin - Source Does Matter

Here's an article about doing it from apple, and if you want to totally nerd out, Here's an AppleScript to query PearLyrics and auto populate.

Once again, Apple is catching up to the features I like in Amarok while still having a bunch more I wish I had. I think their whole tact is about to work on me, and I may just go buy a damned mini just to use as a media box.