Thanks Patrick, for all your good work. This thread has been a major source of info for me.
I have updated to Ubuntu 11.10 and, it runs quite well on the 1810tz, although Unity has it quirks: Unity2D seems to have a better app switcher.
I still use your script: I used it yesterday after the latest Linux headers update I noticed the noisy fan.
After running your script it's quiet again.
Thx again and good luck!