IIRC, lack of physical hole-for-a-port in N900's case was one of the arguments against some implementations of video-out. I guess that the additional microUSB wouldn't fit in any case holes that we have, so it would be for modders-use (or out-of-case), only? Or I haven't got the "without opening the device" part - I can't imagine where 2nd microUSB port would go, in terms of N900's outer body. /Estel