Check this video out at Hi-Res here: http://www.tutvid.com/tutorials/illustrator/tutorials/thePenTool.php
Adobe Illustrator is a vector graphics application, therefore virtually everything in Illustrator is created using paths. The Pen Tool is the king of paths, you can create any king of path using the pen tool, you just need to know how to use it! We are going to learn how to use the pen tool and we will trace the outline of an object as well! Watch, Learn, Enjoy!