I know WEP is the only option when it comes to Amiga PCMCIA WLAN security, but it has to be stated: WEP is useless for providing security. It's trivial to crack it, don't use WLAN-ified A1200s and A600s for anything which you don't want to be seen by other people (and MAC filtering doesn't provide security either, MAC addresses are easily spoofed).
