Garth Nix has been out promoting his books in the UK, and the Online Edition of "News Shopper" reports on a booksigning he did in Bromley on May 3rd. He gave advice to his young readers interested in writing stories, they should start "by introducing a character and a situation, finding a complication and resolving the problem in the conclusion." Yep, the old three-act show works everywhere.
I read this described recently as something along the lines of: in act one force your major character up a tree, in act two throw all the rocks you can find at him, in the third act figure out a way to get him down again.
I guess it's all in the pitch.