When establishing OpenOffice.org for business use, the direct PDF export is one
of the primary advantages. 
But in practical use one feature is missing: different properties for (special
grafics-) objects for real print (via Printer) and PDF-Export.
Background: When writing a letter and sending it out via PDF-Export, you will
include Logos and sender-address, typical placed in a seperat Textbox (frame).
If you want to print the same letter using your PC-printer, then normaly
preprinted paper is used, so logos and/or sender-address (this spezial frame)
should not be printed. 
OK, actuell you can change the printing-property of each element, but this ist -
when using different objects - not a real choise.
A real advantage here should be a second property-value for objects (grafics,
frames,...), which spezifies printing on a printer (as it is now) and visible
(or printing) on PDF-Export.
Then you can use different adjustments for objects depending if using PDF-Export
(sending via e-mail) or printing and sending via "normal" mail.