Today’s auto update of my OS X last.fm client resulted in Growl notifications each time iTunes plays a new song. I like this very much.
I don’t know if this was a change to default settings or whether Growl notification it totally new in this version. But I like. And this is a good example of when it is good to enable your new features by default, even when it changes how things work for existing users. This particular case is a safe one in which to do this.