I have an atheros wifi card which is supported by Madwifi. I downloaded, installed and yast was detecting. When I went on wifi manager it automatically detected my Belkin54g network. When I connected, at 28% it asked for my WEP key. I entered it and it said connected but it wasn't.
Next time it found my network again, but it didn't ask for my wep key. It then didn't connect, although it said it did.
It doesn't return an IP, but it picks up my frequency.