Night Fears, from Evil Hat for the Dresden Files RPG is a fantastic addition to the game. There are a bunch of reasons for this. First, its free. Second, its designed as a one shot. That can be tough to pull off in a Dresden/Fate style game, since there is so much personal involvement usually in creating Fate characters. Third, its just a quality scenario.
Production Values: A
Top notch artwork, layout, and styling, worthy of a paid product.
PreGen Characters: A
The pregens leave some details out, which in this case is a GOOD thing. The players will fill in and customize parts of the characters to make the game their own, which is really the essence of playing a FATE game. There is a good skeleton in place for each PC though to provide a great starting point.
The Scenario: A
Teenagers spend the night in a haunted house on a dare. The whole kit & kaboodle is perfect for a one shot or convention game. The laid out story is interesting, and there's just the right amount of crunch and rules interaction for an introduction to the system. Advice for the GM to help along the way is liberally sprinkled throughout.
People pay happily pay good money for content that isn't half the quality of this. I'd also recommend checking out their other free casefile: Neutral Grounds.