Somebody in the thread at some point said:
I just purchased a belkin wireless g usb adapter and am not having any luck getting it to work.
I have several of these devices... some are zd1211 and some are rt2571 (uses rt73usb driver).
Assuming that one is zd1211, then you need to sort out the firmware in /lib/firmware for it by installing the "zd1211-firmware" package and reinserting the device.
-Andy