Adobe Illustrator CS5 Shape Builder Tool
If you are new to Illustrator or want to learn new features in CS5, then watch this tutorial:http://tv.adobe.com/watch/learn-illustrator-cs5/creating-complex-art-with-the-shape-builder-tool-/
After you practice with this new tool, I am sure you can see the potential for its use. Please leave a comment and link to anything you have created with the shape builder tool.
