My daughter didn't like her iBook G4 12" 1.33Ghz keyboard so I installed a iBook G3 12" 800mhz keyboard on the 1.33 G4 and it worked great. Connector was the same, no fitting, it was a very simple swap. I think all iBooks G3 dual USB (not the clamshell) and the iBook G4 have the same keyboard connector. You can even fit a 14" keyboard in a 12" case but you'll have to fold the cable a little under the keyboard.