I think I found the error in the docs http://wiki.gumstix.org/index.php?title=Category:How_to_-_wifi, it refers to wlan0 as:

For test of basic functionality, do the following at command line (after log in as root / no password): 

root@overo:~# iwconfig wlan0 essid any

root@overo:~# ifconfig wlan0 up

root@overo:~# iwlist wlan0 scan

what should list the wifi's visible, then. 

But when the Overo Com boots up, after around 60 seconds it shows:

uderv: renamed network interface wlan0 to wlan1
ADDRCONF (NETDEV_UP): wlan1: link is not ready

So if anyone tries to follow the instructions on the wiki, guess what, nothing works :)

Does anyone know how to properly configure COM with WPA2 and have it automatically connect at boot time? Where can I find proper, and working text on this?

Thanks, Nader