Useful Links
HowTo: WPA with wpa_supplicant
Connect to WEP Wireless Network by command line on Ubuntu
Linux Wireless: b43 and b43legacy
Debian: WiFi HowToUse
HOWTO: Wireless Security - WPA1, WPA2, LEAP, etc.
Debian Linux Configure Wireless Networking With WPA2
How To: Manual Network Configuration without the need for Network Manager
Setting up wireless with wpa2 on linux