So after a few weekends of work (and some not working), some friends and I have finally finished porting kdelibs from DCOP to D-BUS. It compiles, links and installs. I've just made the final commit on Subversion (I had forgotten to remove a few files from installation).
I'd like to thank Harald Fernengel, Simon Hausmann, Ben Meyer, Roberto Raggi (thanks for the Tiramisu!) and Kévin Ottens for the help on porting. At least if I drop off the face of the earth tomorrow, there's someone with knowledge :-)
You're going to ask: was it difficult? What was the trickiest code?