MacRabbit has released Slicy 1.0 (macrabbit.com/slicy.), a tool for exporting PSD elements as images for the web and apps. It requires Mac OS X 10.6 or higher and is available from http://macrabbit.com/layercake/ or the Mac App Store for an introductory price of US$29.99.
With Layer Cake, you can export to PNG, TIFF, JPG or ICNS. You can save time by having your images automatically exported when you save your PSD. When you want to repeat something manually, your previous exports are a click away.