Directory Opus 9 is in final testing and should be released soon!
Until then, here is Leo's excellent guide to the major new features to keep you all happy 
English: nudel.dopus.com/opus9/
German: haage-partner.de/dopus/tutorial2/ (Translation by Haage & Partner.)
Edit: If you want to talk about the preview in general please use this thread so it's all kept together.