Kaj Grönholm's post about multi-touch motivated me to implement my previous idea of using two tablets to emulate multi-touch input (which should allow for 2 "real" multi-touch cursors). So, I quickly hacked together a modified version of the SimpleSimulator from TUIO_CPP and loaded it on a N800 and a N810. The result works quite well: (link to the video)
Again, the multitouch version of NumptyPhysics uses two cursors for dragging and three cursors for deleting, which works nicely on a multitouch table. Oh, and if you crank up the volume on that video, you will hear the sounds that we have added to NumptyPhysics recently in order to give some audible feedback about the user actions. Stay tuned for more in a few days.