On the surface, it doesn't appear as if much in Excel 2003 has changed. There are a handful of new objects and the user interface is largely the same. But beyond a superficial glance, you'll see that there are fundamental shifts implied by the new features: Lists, XML, web services, .NET, and InfoPath build a framework for entirely new ways to exchange data with Excel. In fact, that's much of what Excel 2003 is all about--solving problems that deal...