http://www.usenix.org/events/tcl2k/full_papers/roseman/roseman_html/
[essentially unlicensable?] - yes. the code is owned by the new owners of TeamWave and they are not indicating any intention to release the 22,000 lines of Java and Tcl . If people want this badly enough, they should attempt to re-engineer it based on the paper Mark Roseman presented.
(abstract: [L1 ], full paper available for purchase or free to USENIX members)