Over at MurphyMac, Murphy has posted a great tutorial about the new Leopard selection tools for Preview.app. As usual, there's an excellent screencast that walks you through the entire process. The new "Extract Shape" tool lets you draw a rough outline around an object and then use selection handles to fit the outline to the shape. The screen cast then goes on to describe how you can matte around the selection to control the edge texture. It's a tidy and easy-to-follow technique that seems to produce nicely trimmed results.