The good news is that I will add the Dart Editor code to the new Web Dungeon site, which I have rewritten and is now 100% Dart! Yep – client and server side. I have even done away with the database. The new web dungeon will ready over the next few days and will post some details on how it works.
Update on 17th April 2014: The dungeon editor is now in the web dungeon site proper, and Google drive banished for all future prototypes and demos. The blog has a Demos page which link to demos hosted on the same server as my blog. It works well and is simple to administer. That makes me happy. To see the working first cut of the dungeon editor, go to http://webdungeon2.org/editor. You can even download your masterful dungeon designs!