How to save energy with Linux

I just discovered this great Intel website: http://www.lesswatts.org/

It gives you useful tips and guides how to save energy on Linux powered machines. In addition to the usual tips like "reduce LCD backlight power" there are some hints i would have never thought of - Did you know that you can save energy by editing your syslog configuration?

There is also a tool to detect programs that "misbehave" when your computer is in idle mode and cause a higher consumption of energy: http://www.lesswatts.org/projects/powertop/

I think it is very useful or even necessary to save as much energy as we can. Not just for your notebook batteries or your electricity bill but also for the climate.