In case you have an old iBook indigo G3 333 tucked away in a cupboard, Jean-louis has put a page online (in french) that shows how to overclock it. He succeeded without much difficulty to push it to 453 MHz. Such manipulations do not change much concerning the obsolescence of this machine; however it gives pleasure without taking much risk.
He has also put online an explication on how to install Tiger, even though there is no integrated DVD reader.
http://www.ianswer.fr/
[translation by crispin]
