Installing ath5k driver on Ubuntu 8.10 Intrepid Ibex
The ath5k driver was removed from Ibex's 2.6.27 kernel, and moved to the backport modules. To get wireless to work (at least for the 701), you need to install an additional package. You will need wired internet access for the following steps.
sudo apt-get update
sudo apt-get install linux-backports-modules-intrepid-generic
sudo modprobe ath5k
EeePC 900s and 701s require "blacklist ath_pci" added to "/etc/modprobe.d/blacklist" to enable wireless.
echo blacklist ath_pci >> /etc/modprobe.d/blacklist
After this you can reboot and your wireless should work.