Excel 2007 and the Open XML file formats

Erika Ehrli has two more great articles in the "Office Visual How-To" series for developers.  See Erika's blog for all the details.  These are based on the work Ken Getz has done with the Visual Studio code snippets for Open XML, and they're well-written straightforward examples of how to accomplish common Open XML development tasks.  More, please!  :-)