I've got a thought: as there's no power from DR to peripherals (anything plugged to microUSB), we have to provide powered devices. Self-powered USB hub like
this one and USB-fem/USB-fem adapter should solve the task. Usually the hubs come with 220v adapter, but I know about several ones powered from 4*AAA batteries = portable. Altogether looks a bit ugly but should work, what do you think?
Another nice thing: this way you can have several USB devices connected, say keyboard+wifi.