Add Matt's latest presentation.

doc/xdocs/articles.html

@@ -40,6 +40,9 @@
     <li><b><a href="http://www.javalobby.org/articles/acegisecurity/part1.jsp">Securing Your Java Applications - Acegi Security Style</a></b>:
 		Matthew Porter wrote this good introductory article for Javalobby.<br><br>
 	</li>
+    <li><b><a href="http://raibledesigns.com/page/rd/20050617#presentations_acegi_security_and_spring">Acegi Security High-Level Overview Presentation</a></b>:
+		Matt Raible has provided a nice <a href="http://www2.java.no/web/files/moter/mai05/AcegiSecurity.pdf">PDF presentation</a> comparing Acegi Security and J2EE CMA.<br><br>
+	</li>
     <li><b><a href="http://www.almaer.com/blog/archives/000640.html">Container Managed Security: If your standard covers a lowest common denominator</a></b>:
 		"For this reason I end up using something like Acegi Security", Dion Almaer comments after listing a series of missing hooks from the Servlet Spec security approach.<br><br>
 	</li>