Microsoft Excel continues to grow in power, sophistication, and capability, but one thing that has changed very little since the early '90s is its user interface. The once-simple toolbar has been packed with so many features over the years that few users know where to find them all. Microsoft has addressed this problem in Excel 2007 by radically redesigning the user interface with a tabbed toolbar that makes every feature easy to locate and use. Unfortunately, Microsoft's documentation is as sca