2nd keyboard/mouse controlling VNC

[Michael Pardee]

For very poor computer users (schools in developing countries, etc.), I
think it should be possible to virtually "split" a monitor and computer by
running two vnc sessions, one on each half of the screen.  To make that
possible it will require sending the output of a secondary keyboard and
mouse directly to a vnc session and disabling the local vncviewer pointer.
 I have looked at rfb proxy and similar programs, but I can't find
anything out there that will grab the signals from the non-primary
keyboard/mouse and send it's output to a VNC server.  Besides the screen
splitting case, it could come in handy in a couple of other scenarios as
well.
Anyone have any ideas on how to accomplish this?
Thanks,
Mike