This is amazing!
http://gkaindl.com/software/touche
I tested it allready. really great stuff! If it would support multiple cameras you would not have to bother about anything related to tracking IR blobs anymore and could focus completely on the interactive fun :).
Oh thats sweet! but what about poor old Windows OS? … 
I emailed the guy and he kindly let me know of a similar window/lunix app
might help someone out
tbeta uses OF. We’ll be integrating much of the same functionality that touche has. We welcome any help/feature requests too. 