Front Matter
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1) Subtitle: remove "the" from before JBEAP

2) Author Group: Red Hat or Red Hat, Inc. for each author's company? Make a choice and stick with it.

3) Abstract: reads awkwardly, uses acronyms and short names before they are explained. Try:
...to install and configure the supported HTTP connectors for use with JBEAP and JBEWS. This guide covers the Apache Tomcat Connector (mod_jk), JBoss HTTP Connector (mod_cluster), Internet Server API (ISAPI) and Netscape Server API (NSAPI), and discusses clustering and load-balancing with regard to each.

4) File Name Conventions:
Examples of paths that each keyword replaces would probably be useful.
"Each convention is styled differently to help you identify them" --> No, they are all styled the same way - just not as regular text.
"for Solaris 9 x86 or SPARC 64: /opt/SUNWwbsrv61" <-- missing trailing slash (or Solaris 10 version has an extra trailing slash)

5) Pull-quote Conventions
I know this isn't an issue with this guide, but it is an issue in general: "mono-spaced roman" is not displayed in mono-spaced roman, but in mono-spaced bold. Might be better off using <code> tag to simulate screen and programlisting output style, there.

6) 3.2 Give us Feedback
URL to bugzilla fills in template incorrectly: "Bug in HTTP Connectors Load Balancing Guide Guide" in summary line