• iso image for ubuntu live cd (can be installed) http://cdimage.ubuntu.com/ports/releases/hardy/release/

• great windowmanager http://awesome.naquadah.org/

• see http://www.macuser.de/forum/archive/index.php/t-261334.html

# info 
modinfo therm_adt746x
# tune fan
modprobe therm_adt746x limit_adjust=15 fan_speed=24
# or
modprobe therm_adt746x

to map apple key to AltGr add to /etc/console-setup/boottime.kmap.gz

keycode 96 = AltGr

http://michael-prokop.at/blog/2008/12/31/apple-tastatur-unter-linux-das-problem-mit-den-funktionstasten/

• http://www.uninformation.org/weblog/133 (german)
• http://uninform.at/e/linux_powerbook_g4_debian (german)