Having played around with XL, Tao3D and Elfe, I have to say there was/is a lot of fun to be had and some very compelling concepts and unique ideas in these projects. Its great to see them mentioned on HN. I found the parse tree approach very educational and its a very nice and powerful alternative to S-expressions. Tao3D was an very quick way to build simple interactive graphics apps and a lot of fun. ELFE has some interesting concepts for distributed computing. While I ended up using Erlang and LISP rather than ELFE it was defintely eye opening in a good way and reminded me of the fun and creativity to be had - - so a huge thank you for the past projects and good luck with the next evolution.