When you type in a name, select a 'conclusion', and click "Generate Letter", an Open Office document (or Star Office document), as specified in the Options window, opens in "listen mode". In other words, the OfficeBean is not used in this example. Then, the selections (and the body, which cannot be changed) are written to the document:
Because the application is on the NetBeans Platform, extending it is going to be easy. I can use the same update center mechanism that the IDE uses, simply by including the IDE's modules that relate to this functionality. Also, using one menu item in the IDE, a ZIP file containing the application, as well as an executable for launching it, is generated. Same story for JNLP-related artifacts.
Wouter and I intend to write an article for http://www.javalobby.org, possibly a primer (i.e., quick start) on Open Office API and NetBeans Platform. But we haven't decided yet what form it will take, however we have agreed to work on something on this general subject for javalobby soon.