OK, after having some time to play, this is by far the best music app I've ever used...being able to browse and listen to tracks on another computer is a great way to get exposure to unfamiliar acts.
Apple's gonna do really well on this once they get their selection up to speed, like a song? 99 cents for an instant, legal download...forget the 30 second teaser with their service, listen to the whole thing first from a friend's computer....hive mind economics...gonna be bigger than sliced bread
