Tavis (of Mule Abides) runs a Red Box New York gaming group, and he's got his players running through the Anomalous Subsurface Environment, among other things. He's managed to somehow crank the gonzo up several notches higher with his changes, so good on him!
The session reports are all posted online here: http://redbox.wikidot.com/white-sandbox-session-summaries . The players arrive at a modified Denethix in session 39, and enter the dungeon proper in sessions 40 and 42.
It's really good stuff if you like reading campaign reports (I do), and it's incredibly gratifying to hear about someone else using something I wrote.