If, on your AspireOne 110 with Ubuntu 9.04, you kincannot see the wifi led blinking you can execute the following commands:
gg1@piccoletto:~$ sudo -s
[sudo] password for gg1:
root@piccoletto:~# apt-get install linux-backports-modules-jaunty
Just wait for the completion of the last command then reboot the AspireOne.
Now the wifi led should work.
gg1