A collection of 11 tutorials on oo-2.0 at http://k12edcom.org/?q=node/24
Extending oo is easier than it used to be.
"Extend OpenOffice.org By Dmitri Popov It's easier than you might think to create your own OpenOffice.org extensions.
If you have a nifty macro or a nice Writer template you want to share with other OpenOffice.org users, publishing them on the Web along with detailed installation instructions is probably not the best way to go. Fortunately, OpenOffice.org supports extensions-small installable packages that provide added functionality. You easily can turn your templates, autotext entries, gallery art and macros into extensions that can be installed with a couple of clicks. Better yet, OpenOffice.org's extensions have an easy-to-understand and well-defined architecture, and you can start building your own extensions in no time........(see http://www.linuxjournal.com/article/9412)"
Best
A. Mani