You could supplement your Smartboard with a wiimote and a projector to
create a wiiboard. ?Here are my notes for doing this under Ubuntu
Intrepid Ibex 8.10:
http://groups.google.com/group/cwelug/msg/fdc31300fd432f7d
This wiiboard is a variation of Johnny Lee's demonstration at TED:
http://www.ted.com/index.php/talks/johnny_lee_demos_wii_remote_hacks.html