Add Ben's blog.

doc/xdocs/navigation.xml

@@ -52,6 +52,7 @@
       <item name="Contacts HTTPS" href="multiproject/acegi-security-sample-contacts/ssl/howto.txt"/>
       <item name="Project Policies" href="policies.html"/>
       <item name="Acegi Security JIRA" href="http://opensource.atlassian.com/projects/spring/secure/BrowseProject.jspa?id=10040"/>
+      <item name="Blog" href="http://blog.springframework.com/ben.alex/"/>
     </menu>
 
     <menu name="Projects">