I'm watching the WWDC Keynote podcast, Just finished the Bertrand Serlet Talk, about Snow Leopard. Now before watching Scott Forstall with the new iPhone 3GS, a little break with an example of Cut, Copy and Paste like Widget. (In the Snow Leopard dock demo, I've seen "the same" widget used to do expose)
It's a really simple example but it can be useful to someone to understand how to add actions to a custom shape.
The Source Code is available Here: Qt4 iPhone Like Cut, Copy Paste Source Code.