I'm using the Cables Unlimited USB-1260-02M micro-A to regular A ordered from Amazon [1]. It has the right pin shorted to put the N810 in to OTG mode...although it took me a couple days to figure out I needed to uninstall the usbcontrol application to get it working. With usbcontrol installed, the N810 would neither automatically enter OTG mode, nor honor a request to enter host mode from usbcontrol. Almost any USB keyboard I've tried works, so long as it does not have a built-in hub. The PS/2 keyboard adapter in an old Targus USB port replicator (model PA090) I have works, as do the USB hub downstream ports. -- Scott [1] http://www.amazon.com/Cables-Unlimited-Meter-Ferrites-USB126002M/dp/B000UNKGHY
