What about a public darcs repository where people can constantly download and review modifications? People could even send patches to the authors (editors?).
I realise that everyone wants to eat their own dog food, but really, if you want the code samples to be available to the masses, you'll use Subversion instead of darcs. No offense to the darcs creators, but 1) Only current Haskellers use it; everyone else either uses Subversion or is migrating to it; 2) It's not suitable for medium- to large-scale software development (after 24 hrs+ of importing code for a project underway, still incomplete, I cancelled it and used Subversion, which completed its import in 45 minutes); 3) I can browse a Subversion repository with a web browser instead of having to download code from the repository from the command line (of course command line is still available). Sometimes viewing a version of a code sample online is all that is needed to answer a question, and in that case I prefer to look instead of downloading a file that I have to delete. --doug