In no particular order:

  • Explain the UNO interfaces, in particular XInterface
  • talk about UNO's IDL
  • talk about exceptions
  • explain the service specification
  • explain UNO Interprocess Connections (maybe how you have to setup openoffice as a server listening on a port?)
  • describe how it works with Java, C++ and possibly python
  • UNO URLs and how it resolves them