I have finally gotten around to updating the MacBook to Snow Leopard (Mac OS X 10.6). Just running the Software Updates now (thank goodness we have decent broadband). I’ve still got to install some applications and copy across all my data but so far so good.
Also took the opportunity to upgrade the 120GB HDD to a 320GB HDD. Compared to the 12″ G4 PowerBook HDD changeout procedure the process was trivial (take battery out, remove panel fixed with 3 screws, pull HDD sled out, replace disk, put everything back together). This future-proofs my MacBook for at least a few years (hopefully).