I'm proud to announce the birth of Croquant !
Croquant is a set of MoinMoin plugins (well... just one for the moment), and aims to allow the writing of Crunchy tutorials directly from the wiki.
From the Croquant website, you can the documentation (okay, it's just a ReadMe), and get the code, using svn.
And you can see Croquant in action, thanks to the screencast of André Roberge: Test Driven Learning (TDL) using Crunchy and MoinMoin.