"I get email every day asking for good sources for more
information on a variety of things from Apache to CGI to mod_perl.
So, this article is as much for me as for you -- so that I can
email back a quick URL to answer their question. ... If you'd like
more information on the Apache server, there are just a few places
that are highly recommended. I've split these into the following
categories: Web, Usenet, Mailing list and print."
"... There are a ton of resources available to help you learn
about the Apache server. With this list, you should never be left
wanting more information."