Well, I see in the docs that:
"Setting a Static IP address and configuring a WiFi USB adapter is not available for hubs prior to Model C-7"
And I have a C-5 
However, after updating to latest firmware, I do see Networking option now in settings. So I ordered the nano adapter and cable (whole $15 for both items) so I'll give it a try. If the docs are correct and C5 hardware won's support USB wifi, then I'll be back to investigating ethernet to wifi adapters again, and still looking for recommendations!
--EDIT--
Looks like C5 is supported with latest firmware. Whew!
