Forgive me if this has already been reported and I missed it, but the hack has finally appeared to allow the Superdrive in the G4 17" to be switched using RegionX. I'm always cautious about flashing my firmware, but I tried it yesterday and it works - tho', having previously upgraded my DVD from UJ-815 to UJ-815A (an Apple firmware update) I had first to find the program to downgrade it before I could run the new program.