Playing iTunes to Multiple Speakers
iTunes can now broadcast to more than one set of speakers at the same time. Previously, you were limited to sending your tunes to the speakers in your computer, or to the speakers attached to an Airport Express, but not both at the same time. Now you finally can!
What this means, in English, is that you could place Airport Express stations throughout your house and use iTunes to play music to some, or all, of them as you like.
One step closer to the brave new digital future.