See 'WikiDevi' @ the Internet Archive (MW XML, Files, Images)
upgraded MW to 1.30 - maybe things are slightly less broken
The device has a Reach Xtend P/N: FR05-S1-NO-1-004, Fractus manuf., Compact Dual-Band Chip Antenna (per the FCC test report).
This device appears to be using an Ozmo Devices (now part of Atmel as of 12/19/2012) chip for the Wi-Fi capabilities. This press release seems to confirm this.
This device communicates with the main Roku player (particularly, the Roku Streaming Stick (3400R)) via Wi-Fi Direct.