See 'WikiDevi' @ the Internet Archive (MW XML, Files, Images)
upgraded MW to 1.30 - maybe things are slightly less broken
"24-000052" is silkscreened on the board in the FCC photos.
The adapter plugs into a proprietary cable which provides DC input power and an ethernet output jack which then goes to the TiVo.
The CPU used in the device appears to be an AR7240. The AR9280 is using two Skyworks SE2593A20 / SiGe 2593A20 Dual-Band 802.11n front-end modules.
A label with an OUI of 00:24:D2 (Askey) is in the FCC internal photos.