I've written a (partial) Z-machine interpreter in Haskell. It is missing lots of stuff, but I got it to the point where it doesn't cause actual pain to play with it ;-). It uses gtk2hs for the interface, though other interfaces could be implemented without actually changing the interpreter proper. (Though I suppose you'd want to get rid of all the trace output if you were going to write a curses UI.) You can either darcs get http://naesten.dyndns.org:8080/repos/ZMachine or grab a tarball at http://naesten.dyndns.org:8080/repos/ZMachine/ZMachine-0.0.tar.gz Patches and comments are greatly desired. (Except for "where is the status area". At least I don't have the stuff intended for the status area going to the main output area like it used to!)