Deep IT has introduced ExpoBoard 1.0 (http://macte.ch/Yru2Z) for Mac OS X. It’s available for US$9.99 exclusively through the Mac App Store in the Productivity category.
Featuring a cork board metaphor, ExpoBoard offers a way to collect and select photos, images, notes, text fragments and sort them into collections. You can move stickers and images freely, resize and rotate them, add transparency, group your images and notes visually, as well as export images as original files or as collage.
ExpoBoard is Lion ready and support its full screen mode. It requires Mac OS X 10.6 or higher.