I have the same problem with OZ 3.5.2 Opie 1.1.7
After insertion of my Asus Spacelink WL-110 in my Zaurus 5500G there are two activated devices: wifi0 and wlan0.
The device wlan0 only work if wifi0 is stopped, wlan0 is restarted and reconfigured. Unfortunately this have to be done after suspend-mode too.
The device wifi0 can not be deleted an is not there when the WLAN-Card is unplugged.
WEP is not enabled in my network.
Is there any solution or workaround?