Ori pointed me to
https://en.wikipedia.org/wiki/Wikipedia:The_Wikipedia_Adventure
(prototype at
http://en.wikipediaadventure.org/).
It's basically a game that walks you through becoming a Wikipedia
editor. It has its own rough tour library, but it seems like they could
use GuidedTour to great effect.
The code (
http://en.wikipediaadventure.org/w/skins/common/tutorial.js)
is under the public domain, so we might be able to use some snippets as
well.
The script is pretty elaborate
(
https://en.wikipedia.org/wiki/Wikipedia:The_Wikipedia_Adventure/Script)
Matt Flaschen