I'll give a +1 to the X confusion.

Also, where are the wiki pages that define the test tour? I'd like to
start playing around, but I can't figure out how to get started making
a test tour.

Another question: is this likely to be a permanent deployment? By
popular demand [1], I'm planning to add some interactive how-to-edit
features to the student training modules [2], and I'd like to try it
with Guided tours if it's expected to stick around.