This looks interesting and useful… I was considering developing something similar to create Flipboard-like effects, but this might just do the trick.
FlipTransform for iOS – Cocoa Controls
Animation component for the effect of flipping as in a news/clock ticker, or a page turn. Structured around the idea of a data object (i.e. headline in news, number in a clock, page in a book) as an animation frame, comprised of multiple CALayers.