Every year at my work, I run a two hour class on Directory Opus. Team Dopus was generous enough to allow me to train on the beta earlier in the year - and I updated my courseware presentation.
While it is SUPPOSED to be accompanied by a lecture, users new and old can still probably get something from it.
I've shared it on Google Docs so you don't have to have Powerpoint or anything other than a decent browser to check it out.
I hope someone finds it useful.