See 'WikiDevi' @ the Internet Archive (MW XML, Files, Images)
upgraded MW to 1.30 - maybe things are slightly less broken
"8WUSN11..2A1G" is silkscreened on the board in the FCC photos.
This device is using AR9271-AL3A.
Probable 00:80:92 (Silex) OUI (it's on the FCC label)