Originally Posted by 9000

You could try these in your N900:

Code:

iwconfig wlan0 mode managed key [WEP key]  
iwconfig wlan0 essid "[ESSID]"
ifconfig wlan0 192.168.1.10 netmask 255.255.255.0 up

(192.168.1 is the WiFi network of yours. Customize your own)

I haven't tried above commands on N900 though. Tell us if it works.