From OpenOffice.org 3.0 Beta Features I noticed some great features about PDF,
In addition to the ISO standard OpenDocument Format (ODF), OpenOffice.org also supports the the popular ISO standard PDF/A. While ODF is used for editable documents, PDF/A is popular for archiving read-only versions of documents.
*Enhanced PDF Export
The PDF export feature in OpenOffice.org provides a huge set of formatting and security options; so that PDF files can be customized for many different scenarios.
*PDF Import Extension
The PDF Import Extension allows modifying existing PDF files for which the original source files do not exist anymore. PDF documents are imported in Draw and Impress to preserve the layout and to allow basic editing. It is the perfect solution for changing dates, numbers or small portions of text. Native PDF forms are not yet imported.
The next development step will focuses more on the edit capabilities and less on layout by using the Writer.
The PDF Import extension will also enable the PDF export into a hybrid PDF file, which is a PDF with the embedded source file as ODF. Hybrid PDF files will be opened in StarOffice as an ODF file without any layout differences, while users without StarOffice can open the PDF part of the hybrid file.
This is just a beta version and it requires the OpenOffice.org 3.0 beta 2 to work. Please help us to optimize this Extension, any feedback is important for us. Find details about the preferred channel in thisGullFOSS article
and you can download PDF Import extension from here