OpenOffice.org Base is undoubtedly a powerful database application, but when it comes to its built-in reporting engine, words like "underpowered" and "outdated" come to mind. Fortunately, you don't have to put up with this situation any longer: with the Sun Report Builder (SRB) extension, you can add nifty reporting features based on Pentaho reporting engine -- assuming you can figure out how to use it without any help.
Pentaho develops top-notch open source business intelligence and reporting tools. The new Report Builder is the first fruit of a collaboration between Sun and Pentaho announced a few months ago. While the first incarnation of the report builder is not as powerful as Pentaho's own reporting tools, it's still a huge improvement over the existing reporting feature.