There is no usb wifi suppotrt in plan9 (unless you know different). Surfing around I found a candidate for a reasonable well documented device if anyone has the time and enthusism.
The RT2571w - a PDF of a datasheet giving register level programming is on the net, and there is a bare metal embedded driver which might be a fair option for example code (better than the Linux driver i suspect). https://github.com/sbourdeauducq/rt2571w At least there is this much info. -Steve
