Today's keyboards are USB HID (devices) so what is this Win OS keyboard? I don't want to offend you here but from a hardware standpoint, one USB keyboard is pretty much like the next. Your best bet is to try the USB keyboard you have now.
Has anyone hooked up an external keyboard via USB to access internet over Viera?
Will any plug and play work? Assuming the Viera system isn't Windows friendly, Win OS keyboards won't work.