Here's the draft version of my planned submission to the One-Page Dungeon 2011 Contest. I plan on letting it sit a day or two, in case I find an error or want to make a change. It's pretty tight at the moment; I'm not sure if this is because describing monsters without providing stats (to make them generic across editions) makes the room keys wordier, or I just need to reduce the number of rooms in the future.
I should probably discuss some of the features, but it's kind of late right now and I've been working on it for several hours. I'll save discussion for a follow-up post, if anyone's interested.
Edit: Spotted 1 error already. Nothing major; the dervish should have a rope ladder in his room, and Room 15 should note that the ogre leaves a barrel of fermented beetle-milk for the dervish.
Edit II: Changed the link to the new version, with the minor corrections.
Edit III: Design notes are now available here.