Ubuntu and the iBook sleep / wake
Well the only problem found so far with Ubuntu is that the computer hang when I sent it to sleep (closing the lid of the iBook). When re-opening the lid, the computer would become unresponsive.
This post gives the exact procedure to do to solve it, until a fix comes in the next Ubuntu kernel...
http://ubuntuforums.org/archive/index.php/t-2368.html
Only thing: in the scripts, replace "dbus-1" by "dbus" both in the name and the contents. This way it worked without problems on my G3 800 Mhz iBook...