I've written a manual for qmail called "Life with qmail". It's not
100% finished, but there's enough there that it's useful. The idea was
to put together a one-stop guide for qmail that binds all of the
available documentation and web pages into one place. It doesn't
duplicate everything in the man pages and other documents: it
describes them on a high level and points to them via links and
references.
I don't see "Life with qmail" as competing with the upcoming book. The
book will contain a lot more information, but will be on paper, and
won't be free. "Life with qmail" will be smaller, but free (GPL) and
electronic (hypertext, searchable). Text, Postscript, PDF, and POD
versions will be made available once it's complete.
Comments, criticism, suggestions, and contributions are welcome.
http://Web.InfoAve.Net/~dsill/lwq.html
-Dave