As I am unable to print my slides correctly from OpenOffice 2 on Ubuntu Breezy (am I stupid, or are there no options to print 4/8/16 slides per page any more?), I decided to convert them to PDF, then resize/rescale them using pdfnup (see my earlier entry for more details).
I use this command to convert an OpenOffice PDF to printable pages, 2 slides across by 2 down:
pdfnup --orient landscape --nup 2x2 --outfile file_new.pdf --paper a4paper --frame True --delta "0.5cm 0.5cm" file.pdf
This seems to work pretty well