It works in the 32-bit release candidate, if you don't
install the ZyXel Utility (i.e. the software) but rather browse to the 'Driver
' folder on the cd via Device Manager or the Install New Hardware pop-up (for example).
The driver on the cd doesn't work in 64-bit Windows versions. Whether there is one available I haven't checked yet, but I doubt. However, it does work in Windows 7 x86 (I'm about to see if it also works in Vista/2K8 - which ZyXel themselves said there is no driver for - but I bet it does!).