Note that the IRC channel tends to be much busier than the mailing list; use whichever seems most appropriate for your query, but don’t let the lack of mailing list activity make you think the project isn’t active.
A project is getting started to make a user-contributed manual using the [http://en.flossmanuals.net/ FLOSS Manuals] web site and tools. The intention is for this manual to be based on but not a verbatim copy of the information on the wiki, formatted in a way that is easier for new users to read, and written mostly by users of Bcfg2, rather than the authors of Bcfg2. This manual will also be free (as in freedom and price).
One important point is that new contributors can get edit access to the manual in about a minute, and the manual is edited via WYSIWYG tools, so there should be pretty much no barrier for new manual authors to get started.
There will be an announcement to the mailing list about this soon.
If you are seriously interested in dedicating time to this manual, it would make sense to read the [http://en.flossmanuals.net/FLOSSManuals FLOSS Manuals Manual] (free online) and the [https://db.usenix.org/cgi-bin/sage/booklets/order.cgi Configuration Management with Bcfg2] manual ($20). If you are willing to commit time to manual writing, would like physical copies of these manuals, and purchasing them would be a financial hardship for you, email [http://pobox.com/~dclark Danny Clark] at dclark@pobox.com (ping djbclark on [wiki:IRCChannel #bcfg2 irc] if you don’t get a reply) with your postal address (don’t be shy, I already bought a bunch of these, and they aren’t doing much good sitting on my shelf :-).
You can get to the Bcfg2 FLOSS Manual at http://docs.bcfg2.org (which just redirects to http://en.flossmanuals.net/bin/view/BCFG2).