[xiamenese]

Ah, OK ... I guess the difference is that I produce any graphics I require in OmniGraffle, which I can import into OO if I need, and which I copy and paste into Keynote (and LinkBack works which is great).

The only other suggestion I have, then, is make your slides in Keynote ... export them to PDF, which you can import to OO and do your outlining. I don't know how that would work in terms of getting it all back into Keynote with the OO text as presentation notes, though ... or rather, whether there would be an easy way of doing it.