doc: add The Expressiveness of Go talk to docs.html

R=r, r2
CC=golang-dev
https://golang.org/cl/2494042

doc/docs.html

@@ -131,6 +131,13 @@ A YouTube channel that includes screencasts and other Go-related videos:
 <li><a href="http://www.youtube.com/watch?v=3brH0zOqm0w">Screencast: Testing Go Packages</a> - writing unit tests and benchmarking Go packages.</li>
 </ul>
 
+<h3 id="jaoo_go"><a href="/doc/ExpressivenessOfGo.pdf">The Expressiveness Of Go</a></h3>
+<p>
+A discussion of the qualities that make Go an expressive and comprehensible
+language.  The talk was presented by Rob Pike at JAOO 2010.
+The recording of the event was lost due to a hardware error.
+</p>
+
 <h3 id="oscon_go"><a href="http://www.oscon.com/oscon2010/public/schedule/detail/14760">Another Go at Language Design</a></h3>
 <p>
 A tour, with some background, of the major features of Go, intended for