I've been toying with proposing that Java be similarly integrated into Emacs, i.e., that Emacs include a vm and have Lisp functions for instantiating Java classes and invoking Java methods. In other words, the proposal is to use Java as a transparent extension to Emacs Lisp. All kinds of good things would flow from this, including from a purely parochial point of view the ability to integrate platform-independent, Java-based GUIs and development tools into the JDE without absorbing a performance hit. I'm not sure that RMS would go for this because Java is not freeware. Or perhaps he would if the integrated vm were guava, the GNU vm. Richard, do you want to comment?