Finally, the Universitat Pompeu Fabra in Barcelona guys around Martin Kaltenbrunner released a special page for TUIO that explains the protocol in more detail and with some examples. In the past it had not been that easy to extract all necessary information from their TUIO paper.
Just in time, before they will hopefully release TUIO 2, which supports OSC via TCP and thus a support for Flash without the need for Flosc or Toxy as Flash does not support native connections via UDP sockets.
Additionally, they moved the reacTIVision site to sourceforge, which seems to be a step that makes sense.