USB ethernet, yes, but USB wireless, highly unlikely and not supported. UTM has a very small and limited range of drivers available to it. Look back through this forum and you might be able to find a thread or two of external NICs that others have tried. It would NEED to be one that uses the exact same chipset that is used in the UTM appliances with built-in wireless.
__________________ ACE v8/SCA v9.3
...still have a v5 install disk in a box somewhere.