En otro foro recomiendan un chipset especifico para los usb wifi. Yo lo he probado y parece funcionar bien.
Just FYI about USB wireless adaptors for Dune ...
Officially Dune players (without built in wlan) support
•RALink RT2870 (all Dune player models)
•RALink RT2880 (all Dune player models)
•RALink RT3070/3071/3072 (only Dune player models based on Sigma Designs 864x/865x platform - Dune BD Prime 3.0, Dune HD Base 3.0, Dune HD Max, Dune HD Duo, Dune HD Smart D1/H1/B1, Dune HD Lite 53D)
If anyone looking for a cheap adaptor can add to this list any usb wireless adaptor with the RT5370 chipset from RAlink/Mediatek. I have tested 3 different brands with the same chipset and they are detected and working properly. All adaptors associate to my AP (mikrotek) at 11n at an advertised 150Mbps rate (true rate not tested yet). The cheapest one bought was around US$4.80 and most expensive is US$11 ... a bargain compared to the dune air.